35 Ill. Adm. Code 310.442
Modification
Section 310
Section 310.442Â Modification
a)Â Â Â Â Â Â Â Â The permittee may request modification of the permit at any
time by filing an application.
b)Â Â Â Â Â Â Â Â If the Agency finds new information or if the Board adopts new
regulations relevant to the permit, the Agency must notify the permittee that
it intends to modify the permit. The Agency must give the permittee the
opportunity to file a new application before it modifies the permit.