35 Ill. Adm. Code 203.210
Relaxation of a Source-Specific Limitation
Section 203
Section 203.210 Relaxation
of a Source-Specific Limitation
a) No person shall cause or allow the operation of a source so as
to exceed any enforceable limitation which affects or defines the applicability
of the requirements of this Part to a stationary source or modification by
specifying the permissible emission rate, operating hours, the type or amount
of material processed, stored or combusted, or other aspects of source
operation.
b) At such time that a particular source or modification becomes
a major stationary source or major modification solely by virtue of a
relaxation in, or expiration of, any enforceable limitation which was
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 this Part shall apply as though construction had not
yet commenced on the source or modification.