Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 201 - PERMITS AND GENERAL PROVISIONS
Subpart M - PERMIT BY RULE (PBR) - GENERAL PROVISIONS
Section 201.520 - Modification or Change in Status of an Emission Unit Covered by a PBR

a) If the owner or operator proposes to modify an emission unit covered by a PBR, the owner or operator of the source must submit a new Notification for a PBR or obtain a construction permit for the modification pursuant to this Part and the Act, as applicable.

b) If a proposed modification of the source at which an emission unit covered by a PBR is located will cause the source to become a major source of HAPs as defined in Section 39.5(2)(c)(i) of the Act, the owner or operator must submit a new Notification for a PBR for the emission unit.