US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDSUBCHAPTER a: PERMITS AND GENERAL PROVISIONSPart 203 — MAJOR STATIONARY SOURCES CONSTRUCTION AND MODIFICATIONSubpart A203.12335 Ill. Adm. Code 203.123Federally EnforceableLast amended: 1993Year: 2026Length: 17 wordsOfficial source Section 203 Section 203.123 Federally Enforceable "Federally enforceable" means enforceable by the United States Environmental Protection Agency.Previous35 Ill. Adm. Code 203.122Next35 Ill. Adm. Code 203.124