35 Ill. Adm. Code 203.305
Compliance by Existing Sources
Section 203
Section 203.305Â Compliance
by Existing Sources
The owner or operator shall
demonstrate that all major stationary sources which he or she owns or operates
(or which are owned or operated by any entity controlling or controlled by, or
under common control, with the owner or operator) in Illinois are in compliance,
or on a schedule for compliance, with all applicable state and federal air
pollution control requirements. For purposes of this Section, a schedule for
compliance must be federally enforceable or contained in an order of the
Illinois Pollution Control Board or a court decree.