US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDSUBCHAPTER a: PERMITS AND GENERAL PROVISIONSPart 204 — PREVENTION OF SIGNIFICANT DETERIORATIONSubpart K204.171035 Ill. Adm. Code 204.1710PAL Effective PeriodYear: 2026Length: 22 wordsOfficial source Section 204.1710 PAL Effective Period "PAL effective period" means the period beginning with the PAL effective date and ending 10 years later.Previous35 Ill. Adm. Code 204.1700Next35 Ill. Adm. Code 204.1720