US lawIllinoisRegulationsTitle 92 — TRANSPORTATIONCHAPTER I: DEPARTMENT OF TRANSPORTATIONSUBCHAPTER e: TRAFFIC SAFETY (EXCEPT HAZARDOUS MATERIALS)Part 451 — ADMINISTRATIVE REQUIREMENTS FOR OFFICIAL TESTING STATIONS451.ILLUSTRATION B92 Ill. Adm. Code 451.ILLUSTRATION BB Exhaust Guidelines (Repealed)Last amended: 1995Year: 2026Length: 8 wordsOfficial source Section 451 Section 451.ILLUSTRATION B Exhaust Guidelines (Repealed)Previous92 Ill. Adm. Code 451.ILLUSTRATION A