US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDPart 301 — INTRODUCTION301.20035 Ill. Adm. Code 301.200DefinitionsLast amended: 2023Year: 2026Length: 26 wordsOfficial source Section 301 Section 301.200 Definitions Except as otherwise provided within individual Parts of this Chapter, the terms defined in the following Sections have the meanings specified.Previous35 Ill. Adm. Code 301.108Next35 Ill. Adm. Code 301.205