US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDSUBCHAPTER a: PERMITS AND GENERAL PROVISIONSPart 203 — MAJOR STATIONARY SOURCES CONSTRUCTION AND MODIFICATIONSubpart A203.12635 Ill. Adm. Code 203.126Lowest Achievable Emission RateLast amended: 1993Year: 2026Length: 17 wordsOfficial source Section 203 Section 203.126 Lowest Achievable Emission Rate "LAER" is an acronym for lowest achievable emission rate.Previous35 Ill. Adm. Code 203.125Next35 Ill. Adm. Code 203.127