Bacillus thuringiensis eCry3.1Ab Protein in Corn; Exemption From the Requirement of a Tolerance, 47287-47291 [2012-19319]
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Federal Register / Vol. 77, No. 153 / Wednesday, August 8, 2012 / Rules and Regulations
within a 500 yards radius of position
43° 06′06″ N, 082° 27′03″ W (NAD 83).
(b) Effective and Enforcement Period.
This regulation is effective and enforced
from 11:00 a.m. on July 28, 2012 until
11:00 a.m. on August 25, 2012.
(c) Regulations.
(1) In accordance with the general
regulations in § 165.23 of this part, entry
into, transiting, or anchoring within this
safety zone is prohibited unless
authorized by the Captain of the Port
Detroit or his designated on-scene
representative.
(2) This safety zone is closed to all
vessel traffic, except as may be
permitted by the Captain of the Port
Detroit or his designated on-scene
representative.
(3) The ‘‘on-scene representative’’ of
the Captain of the Port Detroit is any
Coast Guard commissioned, warrant or
petty officer who has been designated
by the Captain of the Port Detroit to act
on his behalf.
(4) Vessel operators desiring to enter
or operate within the safety zone shall
contact the Captain of the Port Detroit
or his on-scene representative to obtain
permission to do so. The Captain of the
Port Detroit or his on-scene
representative may be contacted via
VHF Channel 16. Vessel operators given
permission to enter or operate in the
safety zone must comply with all
directions given to them by the Captain
of the Port Detroit, or his on-scene
representative.
Dated: July 27, 2012.
J.E. Ogden,
Captain, U. S. Coast Guard, Captain of the
Port Detroit.
[FR Doc. 2012–19347 Filed 8–7–12; 8:45 am]
BILLING CODE 9110–04–P
Crops NAFTA submitted a petition to
EPA under the Federal Food, Drug, and
Cosmetic Act (FFDCA), requesting an
exemption from the requirement of a
tolerance. This regulation eliminates the
need to establish a maximum
permissible level for residues of Bacillus
thuringiensis eCry3.1Ab protein in corn.
DATES: This regulation is effective
August 8, 2012. Objections and requests
for hearings must be received on or
before October 9, 2012, and must be
filed in accordance with the instructions
provided in 40 CFR part 178 (see also
Unit I.C. of the SUPPLEMENTARY
INFORMATION).
The docket for this action,
identified by docket identification (ID)
number EPA–HQ–OPP–2012–0109, is
available either electronically through
https://www.regulations.gov or in hard
copy at the OPP Docket in the
Environmental Protection Agency
Docket Center (EPA/DC), located in EPA
West, Rm. 3334, 1301 Constitution Ave.
NW., Washington, DC 20460–0001. The
Public Reading Room is open from 8:30
a.m. to 4:30 p.m., Monday through
Friday, excluding legal holidays. The
telephone number for the Public
Reading Room is (202) 566–1744, and
the telephone number for the OPP
Docket is (703) 305–5805. Please review
the visitor instructions and additional
information about the docket available
at https://www.epa.gov/dockets.
FOR FURTHER INFORMATION CONTACT:
Mike Mendelsohn, Biopesticides and
Pollution Prevention Division (7511P),
Office of Pesticide Programs,
Environmental Protection Agency, 1200
Pennsylvania Ave. NW., Washington,
DC 20460–0001; telephone number:
(703) 308–8715; email address:
mendelsohn.mike@epa.gov.
ADDRESSES:
SUPPLEMENTARY INFORMATION:
ENVIRONMENTAL PROTECTION
AGENCY
I. General Information
40 CFR Part 174
A. Does this action apply to me?
[EPA–HQ–OPP–2012–0109; FRL–9357–4]
Bacillus thuringiensis eCry3.1Ab
Protein in Corn; Exemption From the
Requirement of a Tolerance
Environmental Protection
Agency (EPA).
ACTION: Final rule.
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AGENCY:
This regulation establishes an
exemption from the requirement of a
tolerance for residues of the plantincorporated protectant (PIP), Bacillus
thuringiensis eCry3.1Ab protein in corn,
in or on the food and feed commodities
of corn; corn, field; corn, sweet; and
corn, pop. Syngenta Seeds, Inc., Field
SUMMARY:
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You may be potentially affected by
this action if you are an agricultural
producer, food manufacturer, or
pesticide manufacturer. Potentially
affected entities may include, but are
not limited to:
• Crop production (NAICS code 111).
• Animal production (NAICS code
112).
• Food manufacturing (NAICS code
311).
• Pesticide manufacturing (NAICS
code 32532).
This listing is not intended to be
exhaustive, but rather provides a guide
for readers regarding entities likely to be
affected by this action. Other types of
entities not listed in this unit could also
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47287
be affected. The North American
Industrial Classification System
(NAICS) codes have been provided to
assist you and others in determining
whether this action might apply to
certain entities. If you have any
questions regarding the applicability of
this action to a particular entity, consult
the person listed under FOR FURTHER
INFORMATION CONTACT.
B. How can I get electronic access to
other related information?
You may access a frequently updated
electronic version of 40 CFR part 174
through the Government Printing
Office’s e-CFR site at https://
ecfr.gpoaccess.gov/cgi/t/text/textidx?&c=ecfr&tpl=/ecfrbrowse/Title40/
40tab_02.tpl.
C. How can I file an objection or hearing
request?
Under FFDCA section 408(g), 21
U.S.C. 346a, any person may file an
objection to any aspect of this regulation
and may also request a hearing on those
objections. You must file your objection
or request a hearing on this regulation
in accordance with the instructions
provided in 40 CFR part 178. To ensure
proper receipt by EPA, you must
identify docket ID number EPA–HQ–
OPP–2012–0109 in the subject line on
the first page of your submission. All
objections and requests for a hearing
must be in writing, and must be
received by the Hearing Clerk on or
before October 9, 2012. Addresses for
mail and hand delivery of objections
and hearing requests are provided in 40
CFR 178.25(b).
In addition to filing an objection or
hearing request with the Hearing Clerk
as described in 40 CFR part 178, please
submit a copy of the filing that does not
contain any CBI for inclusion in the
public docket. Information not marked
confidential pursuant to 40 CFR part 2
may be disclosed publicly by EPA
without prior notice. Submit a copy of
your non-CBI objection or hearing
request, identified by docket ID number
EPA–HQ–OPP–2012–0109, by one of
the following methods:
• Federal eRulemaking Portal: https://
www.regulations.gov. Follow the online
instructions for submitting comments.
Do not submit electronically any
information you consider to be
Confidential Business Information (CBI)
or other information whose disclosure is
restricted by statute.
• Mail: OPP Docket, Environmental
Protection Agency Docket Center (EPA/
DC), Mail Code: 28221T, 1200
Pennsylvania Ave. NW., Washington,
DC 20460–0001.
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• Hand Delivery: To make special
arrangements for hand delivery or
delivery of boxed information, please
follow the instructions at https://
www.epa.gov/dockets/contacts.htm.
Additional instructions on commenting
or visiting the docket, along with more
information about dockets generally, is
available at
https://www.epa.gov/dockets.
II. Background and Statutory Findings
In the Federal Register of April 4,
2012 (77 FR 20337) (FRL–9340–4), EPA
issued a notice pursuant to FFDCA
section 408(d)(3), 21 U.S.C. 346a(d)(3),
announcing the filing of a pesticide
tolerance petition (PP 1F7857) by
Syngenta Seeds, Inc., Field Crops
NAFTA, P.O. Box 12257, 3054 E.
Cornwallis Road, Research Triangle
Park, NC 27709–2257. The petition
requested that 40 CFR 174.532 be
amended by establishing a permanent
exemption from the requirement of a
tolerance for residues of Bacillus
thuringiensis eCry3.1Ab protein in corn,
in or on the food and feed commodities
of corn; corn, field; corn, sweet; and
corn, pop. This notice referenced a
summary of the petition prepared by the
petitioner Syngenta Seeds, Inc., Field
Crops NAFTA, which is available in the
docket, https://www.regulations.gov.
There were no comments received in
response to the notice of filing.
Section 408(c)(2)(A)(i) of FFDCA
allows EPA to establish an exemption
from the requirement for a tolerance (the
legal limit for a pesticide chemical
residue in or on a food) only if EPA
determines that the exemption is ‘‘safe.’’
Section 408(c)(2)(A)(ii) of FFDCA
defines ‘‘safe’’ to mean that ‘‘there is a
reasonable certainty that no harm will
result from aggregate exposure to the
pesticide chemical residue, including
all anticipated dietary exposures and all
other exposures for which there is
reliable information.’’ This includes
exposure through drinking water and in
residential settings, but does not include
occupational exposure. Pursuant to
FFDCA section 408(c)(2)(B), in
establishing or maintaining in effect an
exemption from the requirement of a
tolerance, EPA must take into account
the factors set forth in FFDCA section
408(b)(2)(C), which require EPA to give
special consideration to exposure of
infants and children to the pesticide
chemical residue in establishing a
tolerance and to ‘‘ensure that there is a
reasonable certainty that no harm will
result to infants and children from
aggregate exposure to the pesticide
chemical residue * * *.’’ Additionally,
FFDCA section 408(b)(2)(D) requires
that the Agency consider ‘‘available
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information concerning the cumulative
effects of a particular pesticide’s
residues’’ and ‘‘other substances that
have a common mechanism of toxicity.’’
EPA performs a number of analyses to
determine the risks from aggregate
exposure to pesticide residues. First,
EPA determines the toxicity of
pesticides. Second, EPA examines
exposure to the pesticide through food,
drinking water, and through other
exposures that occur as a result of
pesticide use in residential settings.
III. Toxicological Profile
Consistent with FFDCA section
408(b)(2)(D), EPA has reviewed the
available scientific data and other
relevant information in support of this
action and considered its validity,
completeness and reliability, and the
relationship of this information to
human risk. EPA has also considered
available information concerning the
variability of the sensitivities of major
identifiable subgroups of consumers,
including infants and children.
A. Product Characterization
Based on amino acid sequence
homology and crystal structures, known
Cry proteins have a similar threedimensional structure comprised of
three domains, Domain I, II, and III
(Refs. 1, 2, 3, and 4). The toxin portions
of Cry proteins are characterized by
having five conserved blocks (CB) across
their amino acid sequence. These are
numbered CB1 to CB5 from the Nterminus to the C-terminus (Ref. 5). The
sequences preceding and following
these conserved blocks are highly
variable and are designated as variable
regions V1 to V6. Because Cry proteins
share structural similarities, chimeric
cry genes can be engineered via the
exchange of domains that are
homologous between different cry
genes.
eCry3.1Ab is an engineered chimera
protein, composed of portions of
modified Cry3A (mCry3A) protein, a
protein derived from the native Cry3A
protein from Bt subsp. tenebrionis, and
of the Cry1Ab protein from Bt
thuringiensis subsp. kurstaki HD–1. The
ecry3.1Ab gene (Entrez Accession
Number GU327680 NCBI, 2011)
(Walters et al. 2010) consists of a fusion
between the N-terminus (Domain I,
Domain II, and a portion of Domain III)
of a mcry3A gene and the C-terminus (a
portion of Domain III and Variable
Region 6) of a cry1Ab gene (Ref. 5). The
eCry3.1Ab protein is 654 amino acid
residues in size and is approximately
74.8 kilodaltons.
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B. Mammalian Toxicity Assessment
Syngenta has submitted acute oral
toxicity data demonstrating the lack of
mammalian toxicity at high levels of
exposure to the pure eCry3.1Ab protein.
These data demonstrate the safety of the
product at a level well above maximum
possible exposure levels that are
reasonably anticipated in the crop.
Basing this conclusion on acute oral
toxicity data without requiring further
toxicity testing and residue data is
similar to the Agency position regarding
toxicity testing and the requirement of
residue data for the microbial Bacillus
thuringiensis products from which this
plant-incorporated protectant was
derived (see 40 CFR 158.2130(d)(1)(i)
and 158.2140(d)(7)). For microbial
products, further toxicity testing and
residue data are triggered by significant
adverse acute effects in studies, such as
the mouse oral toxicity study, to verify
and quantify the observed adverse
effects and clarify the source of these
effects (Tiers II & III).
An acute oral toxicity study in mice
(MRID No. 477539–01) indicated that
eCry3.1Ab is non-toxic. Two groups of
10 male and 10 female mice were orally
dosed (via gavage) with 2,000
milligrams/kilograms bodyweight
(eCry3.1Ab protein mg/kg bwt) of the
eCry3.1AB–0208 test substance, a
biochemically and functionally
equivalent microbially-produced
eCry3.1Ab protein. All treated animals
gained weight and had no test materialrelated clinical signs and no test
material-related findings at necropsy.
Since there were no significant
differences between the test and control
groups related to the oral administration
of the eCry3.1AB–0208 test material, the
eCry3.1Ab protein does not appear to
cause any significant adverse effects at
an exposure level of up to 2000 mg/kg
bwt, which supports the finding that the
eCry3.1Ab protein would be non-toxic
to mammals.
When proteins are toxic, they are
known to act via acute mechanisms and
at very low dose levels (Ref. 6).
Therefore, since no acute effects were
shown to be caused by eCry3.1Ab, even
at relatively high dose levels, the
eCry3.1Ab protein is not considered
toxic. Further, amino acid sequence
comparisons showed no similarities
between the eCry3.1Ab protein and
known toxic proteins in protein
databases that would raise a safety
concern.
C. Allergenicity Assessment
Since eCry3.1Ab is a protein,
allergenic sensitivities were considered.
Currently, no definitive tests exist for
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determining the allergenic potential of
novel proteins. Therefore, EPA uses a
‘‘weight-of-the evidence’’ approach
where the following factors are
considered: source of the trait; amino
acid sequence similarity with known
allergens; prevalence in food; and
biochemical properties of the protein,
including in vitro digestibility in
simulated gastric fluid (SGF), and
glycosylation (as recommended by CAC,
2003) (Ref. 7). Current scientific
knowledge suggests that common food
allergens tend to be resistant to
degradation by acid and proteases; may
be glycosylated; and may be present at
high concentrations in the food.
1. Source of the trait. Bacillus
thuringiensis is not considered to be a
source of allergenic proteins.
2. Amino acid sequence. A
comparison of the amino acid sequence
of eCry3.1Ab with known allergens
showed no significant overall sequence
similarity or identity at the level of eight
contiguous amino acid residues. This is
the appropriate level of sensitivity to
detect possible IgE epitopes without
high false positive rates.
3. Prevalence in food. Expression
level analysis of eCry.1Ab protein
demonstrates that it is present at
relatively low levels. The expression has
been shown to be in the parts per
million range. Thus, dietary exposure is
expected to be correspondingly low.
4. Digestibility. The eCry3.1Ab protein
was rapidly digested in less than 30
seconds in simulated mammalian
gastric fluid containing pepsin (pH 1.2)
after incubation at 37 °C.
5. Glycosylation. The eCry3.1Ab
protein expressed in corn was shown
not to be glycosylated.
6. Conclusion. Considering all of the
available information, EPA has
concluded that the potential for
eCry3.1Ab to be a food allergen is
minimal.
IV. Aggregate Exposures
In examining aggregate exposure,
FFDCA section 408 directs EPA to
consider available information
concerning exposures from the pesticide
residue in food and all other nonoccupational exposures, including
drinking water from ground water or
surface water and exposure through
pesticide use in gardens, lawns, or
buildings (residential and other indoor
uses).
The Agency has considered available
information on the aggregate exposure
levels of consumers (and major
identifiable subgroups of consumers) to
the pesticide chemical residue and to
other related substances. First, with
respect to other related substances, the
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eCry3.1Ab protein is a chimeric Bacillus
thuringiensis protein, composed of
portions of Cry1Ab and mCry3A
proteins, both of which are registered
PIPs that were previously assessed as
having a lack of mammalian toxicity at
high levels of exposure. Exemptions
from the requirement of a tolerance
already have been established for
Cry1Ab in food and mCry3A in maize,
see 40 CFR 174.505 and 40 CFR
174.511, respectively. Second, and
specific to the eCry3.1Ab protein, EPA
has considered dietary exposure under
the tolerance exemption and all other
tolerances or exemptions in effect for
the plant-incorporated protectant
chemical residue and exposure from
non-occupational sources. Exposure via
the skin or inhalation is not likely since
the plant-incorporated protectant is
contained within plant cells, which
essentially eliminates these exposure
routes or reduces these exposure routes
to negligible. The amino acid similarity
assessment included similarity to
known aeroallergens. It has been
demonstrated that there is no evidence
of occupationally related respiratory
symptoms, based on a health survey on
migrant workers after exposure to Bt
pesticides (Ref. 8). Exposure via
residential or lawn use to infants and
children is also not expected because
the use sites for the eCry3.1Ab protein
are all agricultural for control of insects.
Oral exposure, at very low levels, may
occur from ingestion of processed corn
products and, potentially, drinking
water.
However, oral toxicity testing done at
a dose of 2 gm/kg showed no adverse
effects. Furthermore, the expected
dietary exposure from corn is several
orders of magnitude lower than the
amounts of eCry3.1Ab protein shown to
have no toxicity. Therefore, even if
negligible aggregate exposure should
occur, the Agency concludes that such
exposure would present no harm due to
the lack of mammalian toxicity and the
rapid digestibility demonstrated for the
eCry3.1Ab protein.
V. Cumulative Effects From Substances
With a Common Mechanism of Toxicity
Section 408(b)(2)(D)(v) of FFDCA
requires that, when considering whether
to establish, modify, or revoke a
tolerance, the Agency consider
‘‘available information’’ concerning the
cumulative effects of a particular
pesticide’s residues and ‘‘other
substances that have a common
mechanism of toxicity.’’
Since eCry3.1Ab is not considered
toxic, EPA has not found eCry3.1Ab to
share a common mechanism of toxicity
with any other substances, and
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eCry3.1Ab does not appear to produce
a toxic metabolite produced by other
substances. For the purposes of this
tolerance action, therefore, EPA has
assumed that eCry3.1Ab does not have
a common mechanism of toxicity with
other substances. Following from this,
therefore, EPA concludes that there are
no cumulative effects associated with
eCry3.1Ab that need be considered. For
information regarding EPA’s efforts to
determine which chemicals have a
common mechanism of toxicity and to
evaluate the cumulative effects of such
chemicals, see EPA’s Web site at
https://www.epa.gov/pesticides/
cumulative.
VI. Determination of Safety for U.S.
Population, Infants and Children
The data submitted and cited
regarding potential health effects for the
eCry3.1Ab protein include the
characterization of the expressed
eCry3.1Ab protein in corn, as well as
the acute oral toxicity, heat stability,
and in vitro digestibility of the proteins.
The results of these studies were used
to evaluate human risk, and the validity,
completeness, and reliability of the
available data from the studies were also
considered.
As discussed more fully in Unit III. B.
above, the acute oral toxicity data
submitted supports the prediction that
the eCry3.1Ab protein would be
nontoxic to humans. Moreover,
eCry3.1Ab showed no sequence
similarity to any known toxin. Because
of this lack of demonstrated mammalian
toxicity, no protein residue chemistry
data for eCry3.1Ab were required for a
human health effects assessment. Even
so, preliminary expression level
analysis showed eCry3.1Ab protein is
present at relatively low levels. Dietary
exposure is expected to be
correspondingly low.
Since eCry3.1Ab is a protein, its
potential allergenicity is also considered
as part of the toxicity assessment. Data
considered as part of the allergenicity
assessment include that the eCry3.1Ab
protein came from Bacillus
thuringiensis which is not a known
allergenic source, showed no sequence
similarity to known allergens, was
readily degraded by pepsin, and was not
glycosylated when expressed in the
plant. Therefore, there is a reasonable
certainty that eCry3.1Ab protein will
not be an allergen.
Considered together, the lack of
mammalian toxicity at high levels of
exposure to the eCry3.1Ab protein and
the minimal potential for that protein to
be a food allergen demonstrate the
safety of the product at levels well
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above possible maximum exposure
levels anticipated in the crop.
Finally, and specifically in regards to
infants and children, FFDCA section
408(b)(2)(C) provides that EPA shall
assess the available information about
consumption patterns among infants
and children, special susceptibility of
infants and children to pesticide
chemical residues, and the cumulative
effects on infants and children of the
residues and other substances with a
common mechanism of toxicity. In
addition, FFDCA section 408(b)(2)(C)
provides that EPA shall apply an
additional tenfold margin of safety for
infants and children in the case of
threshold effects to account for prenatal
and postnatal toxicity and the
completeness of the data base, unless
EPA determines that a different margin
of safety will be safe for infants and
children.
Based on its review and consideration
of all the available information, as
discussed in more detail above, the
Agency concludes that there is a
reasonable certainty that no harm will
result to the U.S. population, including
infants and children, from aggregate
exposure to residues of the eCry3.1Ab
protein and the genetic material
necessary for its production in corn.
This includes all anticipated dietary
exposures and all other exposures for
which there is reliable information. The
Agency has also concluded, again for
the reasons discussed in more detail
above, that there are no threshold effects
of concern and, as a result, that an
additional margin of safety for infants
and children is unnecessary in this
instance.
international maximum residue limits
(MRLs) established by the Codex
Alimentarius Commission (Codex), as
required by FFDCA section 408(b)(4).
The Codex Alimentarius is a joint
United Nations Food and Agriculture
Organization/World Health
Organization food standards program,
and it is recognized as an international
food safety standards-setting
organization in trade agreements to
which the United States is a party. EPA
may establish a tolerance that is
different from a Codex MRL; however,
FFDCA section 408(b)(4) requires that
EPA explain the reasons for establishing
a difference tolerance.
The Codex has not established a MRL
for Bacillus thuringiensis eCry3.1Ab
protein in corn.
VII. Other Considerations
1. Nakamura K, Oshie K, Shimizu M, Takada
Y, Oeda K, Ohkawa H. 1990.
Construction of Chimeric Insecticidal
Proteins Between the 130-kDa and 135kDa Proteins of Bacillus thuringiensis
subsp. aizawai for Analysis of StructureFunction Relationship. Agricultural
Biological Chemistry. 54: 715–724.
2. Li J, Carroll J, Ellar DJ. 1991. Crystal
Structure of Insecticidal delta-Endotoxin
from Bacillus thuringiensis at 2.5 A
resolution. Nature. 353: 815–821.
3. Ge A, Rivers D, Milne R, Dean DH. 1991.
Functional Domains of Bacillus
thuringiensis Insecticidal Crystal
Proteins. Refinement of Heliothis
virescens and Trichoplusiani Specificity
Domains on Cry1A(c). Journal of
Biological Chemistry. 266: 17954–17958.
4. Honee G, Convents D, Van Rie J, Jansens
S, Peferoen M, Visser B. 1991. The CTerminal Domain of the Toxic Fragment
of a Bacillus thuringiensis Crystal
Protein Determines Receptor Binding.
Molecular Microbiology. 5: 2799–2806.
5. Hofte H, Whitley HR. 1989. Insecticidal
Crystal Proteins of Bacillus thuringiensis.
Microbiology Review. 53: 242–255.
A. Analytical Enforcement Methodology
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An analytical method is not required
for enforcement purposes since the
Agency is establishing an exemption
from the requirement of a tolerance
without any numerical limitation.
Nonetheless, Syngenta has submitted
validation method studies on two
qualitative lateral flow strip kits for the
analytical detection of eCry3.1Ab
protein in corn grain, leaf and seed corn
matrices. Results showed the test kits
are able to detect eCry3.1Ab protein
residues in corn with sufficient
accuracy, precision, and sensitivity.
B. International Residue Limits
In making its tolerance decisions, EPA
seeks to harmonize U.S. tolerances with
international standards whenever
possible, consistent with U.S. food
safety standards and agricultural
practices. EPA considers the
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VIII. Conclusions
For all the reasons summarized above,
EPA concludes that there is a reasonable
certainty that no harm will result to the
U.S. population, including infants and
children, from aggregate exposure to
residues of the plant incorporated
protectant (PIP) Bacillus thuringiensis
eCry3.1Ab protein in corn and the
genetic material necessary for its
production. Therefore, the current
temporary exemption for residues of
Bacillus thuringiensis eCry3.1Ab
protein in corn, in or on the food or feed
commodities of corn; corn, field; corn,
sweet; and corn, pop, when used as a
plant-incorporated protectant is
amended in order to remove its
expiration date and make it a permanent
exemption.
IX. References
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6. Sjoblad RD, McClintock JT, Engler R. 1992.
Toxicological Considerations for Protein
Components of Biological Pesticide
Products. Regulatory Toxicology and
Pharmacology. 15(1): 3–9.
7. CAC. 2003. Alinorm 03/34: Joint FAO/
WHO Food Standard Programme. Codex
Alimentarius Commission, Twenty-Fifth
Session, 30 July 2003. Rome, Italy.
Appendix III: Guideline for Conduct of
Food Safety Assessments of Foods
Derived from Recombinant-DNA Plants;
Appendix IV: Annex on Assessment of
Possible Allergenicity. Codex
Alimentarius Commission, 47–60.
8. Bernstein IL, Bernstein JA, Miller M,
Tierzieva S, Bernstein DI., Lummus Z,
Selgrade MK, Doerfler DL, Seligy VL.
1999. Immune responses in farm workers
after exposure to Bacillus thuringiensis
pesticides. Environmental Health
Perspectives. 107(7):575–82.
X. Statutory and Executive Order
Reviews
This final rule establishes a tolerance
exemption under section 408(d) of
FFDCA in response to a petition
submitted to the Agency. The Office of
Management and Budget (OMB) has
exempted these types of actions from
review under Executive Order 12866,
entitled Regulatory Planning and
Review (58 FR 51735, October 4, 1993).
Because this final rule has been
exempted from review under Executive
Order 12866, this final rule is not
subject to Executive Order 13211,
entitled ‘‘Actions Concerning
Regulations That Significantly Affect
Energy Supply, Distribution, or Use’’ (66
FR 28355, May 22, 2001) or Executive
Order 13045, entitled ‘‘Protection of
Children from Environmental Health
Risks and Safety Risks’’ (62 FR 19885,
April 23, 1997). This final rule does not
contain any information collections
subject to OMB approval under the
Paperwork Reduction Act (PRA), 44
U.S.C. 3501 et seq., nor does it require
any special considerations under
Executive Order 12898, entitled
‘‘Federal Actions to Address
Environmental Justice in Minority
Populations and Low-Income
Populations’’ (59 FR 7629, February 16,
1994).
Since tolerances and exemptions that
are established on the basis of a petition
under FFDCA section 408(d), such as
the exemption in this final rule, do not
require the issuance of a proposed rule,
the requirements of the Regulatory
Flexibility Act (RFA) (5 U.S.C. 601 et
seq.) do not apply.
This final rule directly regulates
growers, food processors, food handlers,
and food retailers, not States or tribes,
nor does this action alter the
relationships or distribution of power
and responsibilities established by
E:\FR\FM\08AUR1.SGM
08AUR1
Federal Register / Vol. 77, No. 153 / Wednesday, August 8, 2012 / Rules and Regulations
Congress in the preemption provisions
of FFDCA section 408(n)(4). As such,
the Agency has determined that this
action will not have a substantial direct
effect on States or tribal governments,
on the relationship between the national
government and the States or tribal
governments, or on the distribution of
power and responsibilities among the
various levels of government or between
the Federal Government and Indian
tribes. Thus, the Agency has determined
that Executive Order 13132, entitled
‘‘Federalism’’ (64 FR 43255, August 10,
1999) and Executive Order 13175,
entitled ‘‘Consultation and Coordination
with Indian Tribal Governments’’ (65 FR
67249, November 9, 2000) do not apply
to this final rule. In addition, this final
rule does not impose any enforceable
duty or contain any unfunded mandate
as described under Title II of the
Unfunded Mandates Reform Act of 1995
(UMRA) (Pub. L. 104–4).
This action does not involve any
technical standards that would require
Agency consideration of voluntary
consensus standards pursuant to section
12(d) of the National Technology
Transfer and Advancement Act of 1995
(NTTAA), Public Law 104–113, section
12(d) (15 U.S.C. 272 note).
XI. Congressional Review Act
The Congressional Review Act, 5
U.S.C. 801 et seq., generally provides
that before a rule may take effect, the
agency promulgating the rule must
submit a rule report to each House of
the Congress and to the Comptroller
General of the United States. EPA will
submit a report containing this rule and
other required information to the U.S.
Senate, the U.S. House of
Representatives, and the Comptroller
General of the United States prior to
publication of this final rule in the
Federal Register. This final rule is not
a ‘‘major rule’’ as defined by 5 U.S.C.
804(2).
List of Subjects in 40 CFR Part 174
Environmental protection,
Administrative practice and procedure,
Agricultural commodities, Pesticides
and pests, Reporting and recordkeeping
requirements.
wreier-aviles on DSK5TPTVN1PROD with RULES
Dated: July 30, 2012.
Steven Bradbury,
Director, Office of Pesticide Programs.
Therefore, 40 CFR chapter I is
amended as follows:
PART 174—[AMENDED]
1. The authority citation for part 174
continues to read as follows:
■
Authority: 21 U.S.C. 321(q), 346a and 371.
VerDate Mar<15>2010
13:48 Aug 07, 2012
Jkt 226001
47291
[FR Doc. 2012–19319 Filed 8–7–12; 8:45 am]
the telephone number for the OPP
Docket is (703) 305–5805. Please review
the visitor instructions and additional
information about the docket available
at https://www.epa.gov/dockets.
FOR FURTHER INFORMATION CONTACT:
Tracy Lantz, Antimicrobials Division
(7510P), Office of Pesticide Programs,
Environmental Protection Agency, 1200
Pennsylvania Ave. NW., Washington,
DC 20460–0001; telephone number:
(703) 308–6415; email address: lantz.
tracy@epa.gov.
SUPPLEMENTARY INFORMATION:
BILLING CODE 6560–50–P
I. General Information
2. Section 174.532 is revised to read
as follows:
■
§ 174.532 Bacillus thuringiensis eCry3.1Ab
protein in corn; exemption from the
requirement of a tolerance.
Residues of Bacillus thuringiensis
eCry3.1Ab protein in corn, in or on the
food and feed commodities of corn;
corn, field; corn, sweet; and corn, pop
are exempt from the requirement of a
tolerance when Bacillus thuringiensis
eCry3.1Ab protein in corn is used as a
plant-incorporated protectant.
A. Does this action apply to me?
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 180
[EPA–HQ–OPP–2011–0139; FRL–9356–6]
Residues of Didecyl Dimethyl
Ammonium Chloride; Exemption From
the Requirement of a Tolerance
Environmental Protection
Agency (EPA).
ACTION: Final rule.
AGENCY:
This regulation establishes an
exemption from the requirement of a
tolerance for residues of Didecyl
dimethyl ammonium chloride (DDAC)
in or on broccoli grown from treated
seeds when applied by immersion. Pace
Chemicals Ltd. submitted a petition to
EPA under the Federal Food, Drug, and
Cosmetic Act (FFDCA) requesting an
exemption from the requirement of a
tolerance. This regulation eliminates the
need to establish a maximum
permissible level for residues of DDAC
in or on broccoli seed.
DATES: This regulation is effective
August 8, 2012. Objections and requests
for hearings must be received on or
before October 9, 2012, and must be
filed in accordance with the instructions
provided in 40 CFR part 178 (see also
Unit I.C. of the SUPPLEMENTARY
INFORMATION).
ADDRESSES: The docket for this action,
identified by docket identification (ID)
number EPA–HQ–OPP–2011–0139, is
available either electronically through
https://www.regulations.gov or in hard
copy at the OPP Docket in the
Environmental Protection Agency
Docket Center (EPA/DC), located in EPA
West, Rm. 3334, 1301 Constitution Ave.
NW., Washington, DC 20460–0001. The
Public Reading Room is open from 8:30
a.m. to 4:30 p.m., Monday through
Friday, excluding legal holidays. The
telephone number for the Public
Reading Room is (202) 566–1744, and
SUMMARY:
PO 00000
Frm 00025
Fmt 4700
Sfmt 4700
You may be potentially affected by
this action if you are an agricultural
producer, food manufacturer, or
pesticide manufacturer. Potentially
affected entities may include, but are
not limited to:
• Crop production (NAICS code 111).
• Animal production (NAICS code
112).
• Food manufacturing (NAICS code
311).
• Pesticide manufacturing (NAICS
code 32532).
This listing is not intended to be
exhaustive, but rather provides a guide
for readers regarding entities likely to be
affected by this action. Other types of
entities not listed in this unit could also
be affected. The North American
Industrial Classification System
(NAICS) codes have been provided to
assist you and others in determining
whether this action might apply to
certain entities. If you have any
questions regarding the applicability of
this action to a particular entity, consult
the person listed under FOR FURTHER
INFORMATION CONTACT.
B. How can I get electronic access to
other related information?
You may access a frequently updated
electronic version of 40 CFR part 180
through the Government Printing
Office’s e-CFR site at https://ecfr.
gpoaccess.gov/cgi/t/text/textidx?&c=ecfr&tpl=/ecfrbrowse/Title40/
40tab_02.tpl.
C. How can I file an objection or hearing
request?
Under FFDCA section 408(g), 21
U.S.C. 346a, any person may file an
objection to any aspect of this regulation
and may also request a hearing on those
objections. You must file your objection
or request a hearing on this regulation
in accordance with the instructions
provided in 40 CFR part 178. To ensure
proper receipt by EPA, you must
identify docket ID number EPA–HQ–
E:\FR\FM\08AUR1.SGM
08AUR1
Agencies
[Federal Register Volume 77, Number 153 (Wednesday, August 8, 2012)]
[Rules and Regulations]
[Pages 47287-47291]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2012-19319]
=======================================================================
-----------------------------------------------------------------------
ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 174
[EPA-HQ-OPP-2012-0109; FRL-9357-4]
Bacillus thuringiensis eCry3.1Ab Protein in Corn; Exemption From
the Requirement of a Tolerance
AGENCY: Environmental Protection Agency (EPA).
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: This regulation establishes an exemption from the requirement
of a tolerance for residues of the plant-incorporated protectant (PIP),
Bacillus thuringiensis eCry3.1Ab protein in corn, in or on the food and
feed commodities of corn; corn, field; corn, sweet; and corn, pop.
Syngenta Seeds, Inc., Field Crops NAFTA submitted a petition to EPA
under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting an
exemption from the requirement of a tolerance. This regulation
eliminates the need to establish a maximum permissible level for
residues of Bacillus thuringiensis eCry3.1Ab protein in corn.
DATES: This regulation is effective August 8, 2012. Objections and
requests for hearings must be received on or before October 9, 2012,
and must be filed in accordance with the instructions provided in 40
CFR part 178 (see also Unit I.C. of the SUPPLEMENTARY INFORMATION).
ADDRESSES: The docket for this action, identified by docket
identification (ID) number EPA-HQ-OPP-2012-0109, is available either
electronically through https://www.regulations.gov or in hard copy at
the OPP Docket in the Environmental Protection Agency Docket Center
(EPA/DC), located in EPA West, Rm. 3334, 1301 Constitution Ave. NW.,
Washington, DC 20460-0001. The Public Reading Room is open from 8:30
a.m. to 4:30 p.m., Monday through Friday, excluding legal holidays. The
telephone number for the Public Reading Room is (202) 566-1744, and the
telephone number for the OPP Docket is (703) 305-5805. Please review
the visitor instructions and additional information about the docket
available at https://www.epa.gov/dockets.
FOR FURTHER INFORMATION CONTACT: Mike Mendelsohn, Biopesticides and
Pollution Prevention Division (7511P), Office of Pesticide Programs,
Environmental Protection Agency, 1200 Pennsylvania Ave. NW.,
Washington, DC 20460-0001; telephone number: (703) 308-8715; email
address: mendelsohn.mike@epa.gov.
SUPPLEMENTARY INFORMATION:
I. General Information
A. Does this action apply to me?
You may be potentially affected by this action if you are an
agricultural producer, food manufacturer, or pesticide manufacturer.
Potentially affected entities may include, but are not limited to:
Crop production (NAICS code 111).
Animal production (NAICS code 112).
Food manufacturing (NAICS code 311).
Pesticide manufacturing (NAICS code 32532).
This listing is not intended to be exhaustive, but rather provides
a guide for readers regarding entities likely to be affected by this
action. Other types of entities not listed in this unit could also be
affected. The North American Industrial Classification System (NAICS)
codes have been provided to assist you and others in determining
whether this action might apply to certain entities. If you have any
questions regarding the applicability of this action to a particular
entity, consult the person listed under FOR FURTHER INFORMATION
CONTACT.
B. How can I get electronic access to other related information?
You may access a frequently updated electronic version of 40 CFR
part 174 through the Government Printing Office's e-CFR site at https://ecfr.gpoaccess.gov/cgi/t/text/text-idx?&c=ecfr&tpl=/ecfrbrowse/Title40/40tab_02.tpl.
C. How can I file an objection or hearing request?
Under FFDCA section 408(g), 21 U.S.C. 346a, any person may file an
objection to any aspect of this regulation and may also request a
hearing on those objections. You must file your objection or request a
hearing on this regulation in accordance with the instructions provided
in 40 CFR part 178. To ensure proper receipt by EPA, you must identify
docket ID number EPA-HQ-OPP-2012-0109 in the subject line on the first
page of your submission. All objections and requests for a hearing must
be in writing, and must be received by the Hearing Clerk on or before
October 9, 2012. Addresses for mail and hand delivery of objections and
hearing requests are provided in 40 CFR 178.25(b).
In addition to filing an objection or hearing request with the
Hearing Clerk as described in 40 CFR part 178, please submit a copy of
the filing that does not contain any CBI for inclusion in the public
docket. Information not marked confidential pursuant to 40 CFR part 2
may be disclosed publicly by EPA without prior notice. Submit a copy of
your non-CBI objection or hearing request, identified by docket ID
number EPA-HQ-OPP-2012-0109, by one of the following methods:
Federal eRulemaking Portal: https://www.regulations.gov.
Follow the online instructions for submitting comments. Do not submit
electronically any information you consider to be Confidential Business
Information (CBI) or other information whose disclosure is restricted
by statute.
Mail: OPP Docket, Environmental Protection Agency Docket
Center (EPA/DC), Mail Code: 28221T, 1200 Pennsylvania Ave. NW.,
Washington, DC 20460-0001.
[[Page 47288]]
Hand Delivery: To make special arrangements for hand
delivery or delivery of boxed information, please follow the
instructions at https://www.epa.gov/dockets/contacts.htm. Additional
instructions on commenting or visiting the docket, along with more
information about dockets generally, is available at https://www.epa.gov/dockets.
II. Background and Statutory Findings
In the Federal Register of April 4, 2012 (77 FR 20337) (FRL-9340-
4), EPA issued a notice pursuant to FFDCA section 408(d)(3), 21 U.S.C.
346a(d)(3), announcing the filing of a pesticide tolerance petition (PP
1F7857) by Syngenta Seeds, Inc., Field Crops NAFTA, P.O. Box 12257,
3054 E. Cornwallis Road, Research Triangle Park, NC 27709-2257. The
petition requested that 40 CFR 174.532 be amended by establishing a
permanent exemption from the requirement of a tolerance for residues of
Bacillus thuringiensis eCry3.1Ab protein in corn, in or on the food and
feed commodities of corn; corn, field; corn, sweet; and corn, pop. This
notice referenced a summary of the petition prepared by the petitioner
Syngenta Seeds, Inc., Field Crops NAFTA, which is available in the
docket, https://www.regulations.gov. There were no comments received in
response to the notice of filing.
Section 408(c)(2)(A)(i) of FFDCA allows EPA to establish an
exemption from the requirement for a tolerance (the legal limit for a
pesticide chemical residue in or on a food) only if EPA determines that
the exemption is ``safe.'' Section 408(c)(2)(A)(ii) of FFDCA defines
``safe'' to mean that ``there is a reasonable certainty that no harm
will result from aggregate exposure to the pesticide chemical residue,
including all anticipated dietary exposures and all other exposures for
which there is reliable information.'' This includes exposure through
drinking water and in residential settings, but does not include
occupational exposure. Pursuant to FFDCA section 408(c)(2)(B), in
establishing or maintaining in effect an exemption from the requirement
of a tolerance, EPA must take into account the factors set forth in
FFDCA section 408(b)(2)(C), which require EPA to give special
consideration to exposure of infants and children to the pesticide
chemical residue in establishing a tolerance and to ``ensure that there
is a reasonable certainty that no harm will result to infants and
children from aggregate exposure to the pesticide chemical residue * *
*.'' Additionally, FFDCA section 408(b)(2)(D) requires that the Agency
consider ``available information concerning the cumulative effects of a
particular pesticide's residues'' and ``other substances that have a
common mechanism of toxicity.''
EPA performs a number of analyses to determine the risks from
aggregate exposure to pesticide residues. First, EPA determines the
toxicity of pesticides. Second, EPA examines exposure to the pesticide
through food, drinking water, and through other exposures that occur as
a result of pesticide use in residential settings.
III. Toxicological Profile
Consistent with FFDCA section 408(b)(2)(D), EPA has reviewed the
available scientific data and other relevant information in support of
this action and considered its validity, completeness and reliability,
and the relationship of this information to human risk. EPA has also
considered available information concerning the variability of the
sensitivities of major identifiable subgroups of consumers, including
infants and children.
A. Product Characterization
Based on amino acid sequence homology and crystal structures, known
Cry proteins have a similar three-dimensional structure comprised of
three domains, Domain I, II, and III (Refs. 1, 2, 3, and 4). The toxin
portions of Cry proteins are characterized by having five conserved
blocks (CB) across their amino acid sequence. These are numbered CB1 to
CB5 from the N-terminus to the C-terminus (Ref. 5). The sequences
preceding and following these conserved blocks are highly variable and
are designated as variable regions V1 to V6. Because Cry proteins share
structural similarities, chimeric cry genes can be engineered via the
exchange of domains that are homologous between different cry genes.
eCry3.1Ab is an engineered chimera protein, composed of portions of
modified Cry3A (mCry3A) protein, a protein derived from the native
Cry3A protein from Bt subsp. tenebrionis, and of the Cry1Ab protein
from Bt thuringiensis subsp. kurstaki HD-1. The ecry3.1Ab gene (Entrez
Accession Number GU327680 NCBI, 2011) (Walters et al. 2010) consists of
a fusion between the N-terminus (Domain I, Domain II, and a portion of
Domain III) of a mcry3A gene and the C-terminus (a portion of Domain
III and Variable Region 6) of a cry1Ab gene (Ref. 5). The eCry3.1Ab
protein is 654 amino acid residues in size and is approximately 74.8
kilodaltons.
B. Mammalian Toxicity Assessment
Syngenta has submitted acute oral toxicity data demonstrating the
lack of mammalian toxicity at high levels of exposure to the pure
eCry3.1Ab protein. These data demonstrate the safety of the product at
a level well above maximum possible exposure levels that are reasonably
anticipated in the crop. Basing this conclusion on acute oral toxicity
data without requiring further toxicity testing and residue data is
similar to the Agency position regarding toxicity testing and the
requirement of residue data for the microbial Bacillus thuringiensis
products from which this plant-incorporated protectant was derived (see
40 CFR 158.2130(d)(1)(i) and 158.2140(d)(7)). For microbial products,
further toxicity testing and residue data are triggered by significant
adverse acute effects in studies, such as the mouse oral toxicity
study, to verify and quantify the observed adverse effects and clarify
the source of these effects (Tiers II & III).
An acute oral toxicity study in mice (MRID No. 477539-01) indicated
that eCry3.1Ab is non-toxic. Two groups of 10 male and 10 female mice
were orally dosed (via gavage) with 2,000 milligrams/kilograms
bodyweight (eCry3.1Ab protein mg/kg bwt) of the eCry3.1AB-0208 test
substance, a biochemically and functionally equivalent microbially-
produced eCry3.1Ab protein. All treated animals gained weight and had
no test material-related clinical signs and no test material-related
findings at necropsy. Since there were no significant differences
between the test and control groups related to the oral administration
of the eCry3.1AB-0208 test material, the eCry3.1Ab protein does not
appear to cause any significant adverse effects at an exposure level of
up to 2000 mg/kg bwt, which supports the finding that the eCry3.1Ab
protein would be non-toxic to mammals.
When proteins are toxic, they are known to act via acute mechanisms
and at very low dose levels (Ref. 6). Therefore, since no acute effects
were shown to be caused by eCry3.1Ab, even at relatively high dose
levels, the eCry3.1Ab protein is not considered toxic. Further, amino
acid sequence comparisons showed no similarities between the eCry3.1Ab
protein and known toxic proteins in protein databases that would raise
a safety concern.
C. Allergenicity Assessment
Since eCry3.1Ab is a protein, allergenic sensitivities were
considered. Currently, no definitive tests exist for
[[Page 47289]]
determining the allergenic potential of novel proteins. Therefore, EPA
uses a ``weight-of-the evidence'' approach where the following factors
are considered: source of the trait; amino acid sequence similarity
with known allergens; prevalence in food; and biochemical properties of
the protein, including in vitro digestibility in simulated gastric
fluid (SGF), and glycosylation (as recommended by CAC, 2003) (Ref. 7).
Current scientific knowledge suggests that common food allergens tend
to be resistant to degradation by acid and proteases; may be
glycosylated; and may be present at high concentrations in the food.
1. Source of the trait. Bacillus thuringiensis is not considered to
be a source of allergenic proteins.
2. Amino acid sequence. A comparison of the amino acid sequence of
eCry3.1Ab with known allergens showed no significant overall sequence
similarity or identity at the level of eight contiguous amino acid
residues. This is the appropriate level of sensitivity to detect
possible IgE epitopes without high false positive rates.
3. Prevalence in food. Expression level analysis of eCry.1Ab
protein demonstrates that it is present at relatively low levels. The
expression has been shown to be in the parts per million range. Thus,
dietary exposure is expected to be correspondingly low.
4. Digestibility. The eCry3.1Ab protein was rapidly digested in
less than 30 seconds in simulated mammalian gastric fluid containing
pepsin (pH 1.2) after incubation at 37 [deg]C.
5. Glycosylation. The eCry3.1Ab protein expressed in corn was shown
not to be glycosylated.
6. Conclusion. Considering all of the available information, EPA
has concluded that the potential for eCry3.1Ab to be a food allergen is
minimal.
IV. Aggregate Exposures
In examining aggregate exposure, FFDCA section 408 directs EPA to
consider available information concerning exposures from the pesticide
residue in food and all other non-occupational exposures, including
drinking water from ground water or surface water and exposure through
pesticide use in gardens, lawns, or buildings (residential and other
indoor uses).
The Agency has considered available information on the aggregate
exposure levels of consumers (and major identifiable subgroups of
consumers) to the pesticide chemical residue and to other related
substances. First, with respect to other related substances, the
eCry3.1Ab protein is a chimeric Bacillus thuringiensis protein,
composed of portions of Cry1Ab and mCry3A proteins, both of which are
registered PIPs that were previously assessed as having a lack of
mammalian toxicity at high levels of exposure. Exemptions from the
requirement of a tolerance already have been established for Cry1Ab in
food and mCry3A in maize, see 40 CFR 174.505 and 40 CFR 174.511,
respectively. Second, and specific to the eCry3.1Ab protein, EPA has
considered dietary exposure under the tolerance exemption and all other
tolerances or exemptions in effect for the plant-incorporated
protectant chemical residue and exposure from non-occupational sources.
Exposure via the skin or inhalation is not likely since the plant-
incorporated protectant is contained within plant cells, which
essentially eliminates these exposure routes or reduces these exposure
routes to negligible. The amino acid similarity assessment included
similarity to known aeroallergens. It has been demonstrated that there
is no evidence of occupationally related respiratory symptoms, based on
a health survey on migrant workers after exposure to Bt pesticides
(Ref. 8). Exposure via residential or lawn use to infants and children
is also not expected because the use sites for the eCry3.1Ab protein
are all agricultural for control of insects. Oral exposure, at very low
levels, may occur from ingestion of processed corn products and,
potentially, drinking water.
However, oral toxicity testing done at a dose of 2 gm/kg showed no
adverse effects. Furthermore, the expected dietary exposure from corn
is several orders of magnitude lower than the amounts of eCry3.1Ab
protein shown to have no toxicity. Therefore, even if negligible
aggregate exposure should occur, the Agency concludes that such
exposure would present no harm due to the lack of mammalian toxicity
and the rapid digestibility demonstrated for the eCry3.1Ab protein.
V. Cumulative Effects From Substances With a Common Mechanism of
Toxicity
Section 408(b)(2)(D)(v) of FFDCA requires that, when considering
whether to establish, modify, or revoke a tolerance, the Agency
consider ``available information'' concerning the cumulative effects of
a particular pesticide's residues and ``other substances that have a
common mechanism of toxicity.''
Since eCry3.1Ab is not considered toxic, EPA has not found
eCry3.1Ab to share a common mechanism of toxicity with any other
substances, and eCry3.1Ab does not appear to produce a toxic metabolite
produced by other substances. For the purposes of this tolerance
action, therefore, EPA has assumed that eCry3.1Ab does not have a
common mechanism of toxicity with other substances. Following from
this, therefore, EPA concludes that there are no cumulative effects
associated with eCry3.1Ab that need be considered. For information
regarding EPA's efforts to determine which chemicals have a common
mechanism of toxicity and to evaluate the cumulative effects of such
chemicals, see EPA's Web site at https://www.epa.gov/pesticides/cumulative.
VI. Determination of Safety for U.S. Population, Infants and Children
The data submitted and cited regarding potential health effects for
the eCry3.1Ab protein include the characterization of the expressed
eCry3.1Ab protein in corn, as well as the acute oral toxicity, heat
stability, and in vitro digestibility of the proteins. The results of
these studies were used to evaluate human risk, and the validity,
completeness, and reliability of the available data from the studies
were also considered.
As discussed more fully in Unit III. B. above, the acute oral
toxicity data submitted supports the prediction that the eCry3.1Ab
protein would be nontoxic to humans. Moreover, eCry3.1Ab showed no
sequence similarity to any known toxin. Because of this lack of
demonstrated mammalian toxicity, no protein residue chemistry data for
eCry3.1Ab were required for a human health effects assessment. Even so,
preliminary expression level analysis showed eCry3.1Ab protein is
present at relatively low levels. Dietary exposure is expected to be
correspondingly low.
Since eCry3.1Ab is a protein, its potential allergenicity is also
considered as part of the toxicity assessment. Data considered as part
of the allergenicity assessment include that the eCry3.1Ab protein came
from Bacillus thuringiensis which is not a known allergenic source,
showed no sequence similarity to known allergens, was readily degraded
by pepsin, and was not glycosylated when expressed in the plant.
Therefore, there is a reasonable certainty that eCry3.1Ab protein will
not be an allergen.
Considered together, the lack of mammalian toxicity at high levels
of exposure to the eCry3.1Ab protein and the minimal potential for that
protein to be a food allergen demonstrate the safety of the product at
levels well
[[Page 47290]]
above possible maximum exposure levels anticipated in the crop.
Finally, and specifically in regards to infants and children, FFDCA
section 408(b)(2)(C) provides that EPA shall assess the available
information about consumption patterns among infants and children,
special susceptibility of infants and children to pesticide chemical
residues, and the cumulative effects on infants and children of the
residues and other substances with a common mechanism of toxicity. In
addition, FFDCA section 408(b)(2)(C) provides that EPA shall apply an
additional tenfold margin of safety for infants and children in the
case of threshold effects to account for prenatal and postnatal
toxicity and the completeness of the data base, unless EPA determines
that a different margin of safety will be safe for infants and
children.
Based on its review and consideration of all the available
information, as discussed in more detail above, the Agency concludes
that there is a reasonable certainty that no harm will result to the
U.S. population, including infants and children, from aggregate
exposure to residues of the eCry3.1Ab protein and the genetic material
necessary for its production in corn. This includes all anticipated
dietary exposures and all other exposures for which there is reliable
information. The Agency has also concluded, again for the reasons
discussed in more detail above, that there are no threshold effects of
concern and, as a result, that an additional margin of safety for
infants and children is unnecessary in this instance.
VII. Other Considerations
A. Analytical Enforcement Methodology
An analytical method is not required for enforcement purposes since
the Agency is establishing an exemption from the requirement of a
tolerance without any numerical limitation. Nonetheless, Syngenta has
submitted validation method studies on two qualitative lateral flow
strip kits for the analytical detection of eCry3.1Ab protein in corn
grain, leaf and seed corn matrices. Results showed the test kits are
able to detect eCry3.1Ab protein residues in corn with sufficient
accuracy, precision, and sensitivity.
B. International Residue Limits
In making its tolerance decisions, EPA seeks to harmonize U.S.
tolerances with international standards whenever possible, consistent
with U.S. food safety standards and agricultural practices. EPA
considers the international maximum residue limits (MRLs) established
by the Codex Alimentarius Commission (Codex), as required by FFDCA
section 408(b)(4). The Codex Alimentarius is a joint United Nations
Food and Agriculture Organization/World Health Organization food
standards program, and it is recognized as an international food safety
standards-setting organization in trade agreements to which the United
States is a party. EPA may establish a tolerance that is different from
a Codex MRL; however, FFDCA section 408(b)(4) requires that EPA explain
the reasons for establishing a difference tolerance.
The Codex has not established a MRL for Bacillus thuringiensis
eCry3.1Ab protein in corn.
VIII. Conclusions
For all the reasons summarized above, EPA concludes that there is a
reasonable certainty that no harm will result to the U.S. population,
including infants and children, from aggregate exposure to residues of
the plant incorporated protectant (PIP) Bacillus thuringiensis
eCry3.1Ab protein in corn and the genetic material necessary for its
production. Therefore, the current temporary exemption for residues of
Bacillus thuringiensis eCry3.1Ab protein in corn, in or on the food or
feed commodities of corn; corn, field; corn, sweet; and corn, pop, when
used as a plant-incorporated protectant is amended in order to remove
its expiration date and make it a permanent exemption.
IX. References
1. Nakamura K, Oshie K, Shimizu M, Takada Y, Oeda K, Ohkawa H. 1990.
Construction of Chimeric Insecticidal Proteins Between the 130-kDa
and 135-kDa Proteins of Bacillus thuringiensis subsp. aizawai for
Analysis of Structure-Function Relationship. Agricultural Biological
Chemistry. 54: 715-724.
2. Li J, Carroll J, Ellar DJ. 1991. Crystal Structure of
Insecticidal delta-Endotoxin from Bacillus thuringiensis at 2.5 A
resolution. Nature. 353: 815-821.
3. Ge A, Rivers D, Milne R, Dean DH. 1991. Functional Domains of
Bacillus thuringiensis Insecticidal Crystal Proteins. Refinement of
Heliothis virescens and Trichoplusiani Specificity Domains on
Cry1A(c). Journal of Biological Chemistry. 266: 17954-17958.
4. Honee G, Convents D, Van Rie J, Jansens S, Peferoen M, Visser B.
1991. The C-Terminal Domain of the Toxic Fragment of a Bacillus
thuringiensis Crystal Protein Determines Receptor Binding. Molecular
Microbiology. 5: 2799-2806.
5. Hofte H, Whitley HR. 1989. Insecticidal Crystal Proteins of
Bacillus thuringiensis. Microbiology Review. 53: 242-255.
6. Sjoblad RD, McClintock JT, Engler R. 1992. Toxicological
Considerations for Protein Components of Biological Pesticide
Products. Regulatory Toxicology and Pharmacology. 15(1): 3-9.
7. CAC. 2003. Alinorm 03/34: Joint FAO/WHO Food Standard Programme.
Codex Alimentarius Commission, Twenty-Fifth Session, 30 July 2003.
Rome, Italy. Appendix III: Guideline for Conduct of Food Safety
Assessments of Foods Derived from Recombinant-DNA Plants; Appendix
IV: Annex on Assessment of Possible Allergenicity. Codex
Alimentarius Commission, 47-60.
8. Bernstein IL, Bernstein JA, Miller M, Tierzieva S, Bernstein DI.,
Lummus Z, Selgrade MK, Doerfler DL, Seligy VL. 1999. Immune
responses in farm workers after exposure to Bacillus thuringiensis
pesticides. Environmental Health Perspectives. 107(7):575-82.
X. Statutory and Executive Order Reviews
This final rule establishes a tolerance exemption under section
408(d) of FFDCA in response to a petition submitted to the Agency. The
Office of Management and Budget (OMB) has exempted these types of
actions from review under Executive Order 12866, entitled Regulatory
Planning and Review (58 FR 51735, October 4, 1993). Because this final
rule has been exempted from review under Executive Order 12866, this
final rule is not subject to Executive Order 13211, entitled ``Actions
Concerning Regulations That Significantly Affect Energy Supply,
Distribution, or Use'' (66 FR 28355, May 22, 2001) or Executive Order
13045, entitled ``Protection of Children from Environmental Health
Risks and Safety Risks'' (62 FR 19885, April 23, 1997). This final rule
does not contain any information collections subject to OMB approval
under the Paperwork Reduction Act (PRA), 44 U.S.C. 3501 et seq., nor
does it require any special considerations under Executive Order 12898,
entitled ``Federal Actions to Address Environmental Justice in Minority
Populations and Low-Income Populations'' (59 FR 7629, February 16,
1994).
Since tolerances and exemptions that are established on the basis
of a petition under FFDCA section 408(d), such as the exemption in this
final rule, do not require the issuance of a proposed rule, the
requirements of the Regulatory Flexibility Act (RFA) (5 U.S.C. 601 et
seq.) do not apply.
This final rule directly regulates growers, food processors, food
handlers, and food retailers, not States or tribes, nor does this
action alter the relationships or distribution of power and
responsibilities established by
[[Page 47291]]
Congress in the preemption provisions of FFDCA section 408(n)(4). As
such, the Agency has determined that this action will not have a
substantial direct effect on States or tribal governments, on the
relationship between the national government and the States or tribal
governments, or on the distribution of power and responsibilities among
the various levels of government or between the Federal Government and
Indian tribes. Thus, the Agency has determined that Executive Order
13132, entitled ``Federalism'' (64 FR 43255, August 10, 1999) and
Executive Order 13175, entitled ``Consultation and Coordination with
Indian Tribal Governments'' (65 FR 67249, November 9, 2000) do not
apply to this final rule. In addition, this final rule does not impose
any enforceable duty or contain any unfunded mandate as described under
Title II of the Unfunded Mandates Reform Act of 1995 (UMRA) (Pub. L.
104-4).
This action does not involve any technical standards that would
require Agency consideration of voluntary consensus standards pursuant
to section 12(d) of the National Technology Transfer and Advancement
Act of 1995 (NTTAA), Public Law 104-113, section 12(d) (15 U.S.C. 272
note).
XI. Congressional Review Act
The Congressional Review Act, 5 U.S.C. 801 et seq., generally
provides that before a rule may take effect, the agency promulgating
the rule must submit a rule report to each House of the Congress and to
the Comptroller General of the United States. EPA will submit a report
containing this rule and other required information to the U.S. Senate,
the U.S. House of Representatives, and the Comptroller General of the
United States prior to publication of this final rule in the Federal
Register. This final rule is not a ``major rule'' as defined by 5
U.S.C. 804(2).
List of Subjects in 40 CFR Part 174
Environmental protection, Administrative practice and procedure,
Agricultural commodities, Pesticides and pests, Reporting and
recordkeeping requirements.
Dated: July 30, 2012.
Steven Bradbury,
Director, Office of Pesticide Programs.
Therefore, 40 CFR chapter I is amended as follows:
PART 174--[AMENDED]
0
1. The authority citation for part 174 continues to read as follows:
Authority: 21 U.S.C. 321(q), 346a and 371.
0
2. Section 174.532 is revised to read as follows:
Sec. 174.532 Bacillus thuringiensis eCry3.1Ab protein in corn;
exemption from the requirement of a tolerance.
Residues of Bacillus thuringiensis eCry3.1Ab protein in corn, in or
on the food and feed commodities of corn; corn, field; corn, sweet; and
corn, pop are exempt from the requirement of a tolerance when Bacillus
thuringiensis eCry3.1Ab protein in corn is used as a plant-incorporated
protectant.
[FR Doc. 2012-19319 Filed 8-7-12; 8:45 am]
BILLING CODE 6560-50-P