California Code of Regulations
Title 14 - Natural Resources
Division 6 - Resources Agency
Chapter 3 - Guidelines for Implementation of the California Environmental Quality Act
Article 10 - Considerations in Preparing EIRs and Negative Declarations
Section 15150 - Incorporation by Reference

(a) An EIR or negative declaration may incorporate by reference all or portions of another document which is a matter of public record or is generally available to the public. Where all or part of another document is incorporated by reference, the incorporated language shall be considered to be set forth in full as part of the text of the EIR or negative declaration.

(b) Where part of another document is incorporated by reference, such other document shall be made available to the public for inspection at a public place or public building. The EIR or negative declaration shall state where the incorporated documents will be available for inspection. At a minimum, the incorporated document shall be made available to the public in an office of the lead agency in the county where the project would be carried out or in one or more public buildings such as county offices or public libraries if the lead agency does not have an office in the county.

(c) Where an EIR or negative declaration uses incorporation by reference, the incorporated part of the referenced document shall be briefly summarized where possible or briefly described if the data or information cannot be summarized. The relationship between the incorporated part of the referenced document and the EIR shall be described.

(d) Where an agency incorporates information from an EIR that has previously been reviewed through the state review system, the state identification number of the incorporated document should be included in the summary or designation described in subdivision (c).

(e) Examples of materials that may be incorporated by reference include but are not limited to:

(f) Incorporation by reference is most appropriate for including long, descriptive, or technical materials that provide general background but do not contribute directly to the analysis of the problem at hand.