35 Ill. Adm. Code 270.501
Applicability
Section 270
Section 270.501
Applicability
The provisions of this Subpart
shall apply only if:
a) The Agency determines that cause exists to reopen and revise a
CAAPP permit, pursuant to Section 39.5(15)(a) of the Act; or
b) USEPA determines that cause exists to reopen and modify a
CAAPP permit, pursuant to Section 39.5(16) of the Act.