35 Ill. Adm. Code 204.850
Relaxation of a Source-Specific Limitation
Section 204.850 Relaxation of a Source-Specific
Limitation
At such time as a particular source or modification becomes
a major stationary source or major modification solely by virtue of a
relaxation in any enforceable limitation, established after August 7, 1980, on
the capacity of the source or modification otherwise to emit a pollutant, such
as a restriction on hours of operation, then the requirements of Sections
204.810, 204.820, 204.830, 204.840, 204.850, 204.1100, 204.1110, 204.1120,
204.1130, 204.1140, 204.1200, and 204.1400 shall apply to the source or
modification as though construction had not yet commenced on the source or
modification.