35 Ill. Adm. Code 502.303
New Source Standards
Section 502
Section 502.303Â New Source
Standards
Despite any other provision of
this Subtitle, if a point source started construction after the enactment date of
the CWA and was constructed to meet the applicable federal "standard of
performance" defined in Section 306 of the CWA, the point source is not
subject to any more stringent federal "standard of performance"
during a ten-year period beginning on the date the construction is completed or
during the depreciation or amortization period of the facility for Section 167
or 169 (or both) of the Internal Revenue Code of 1954, whichever period ends
first (26 U.S.C. 167 and 169).