35 Ill. Adm. Code 201.142
Construction Permit Required
Section 201
Section 201.142 Construction
Permit Required
No person shall cause or allow
the construction of any new emission source or any new air pollution control
equipment, or cause or allow the modification of any existing emission source
or air pollution control equipment, without first obtaining a construction
permit from the Agency, except as provided in Sections 201.146 or Section
201.170(b) of this Part.