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CURRENT RULEIllinoisInspection / emissions✓ Human reviewed

Does your Illinois testing-station or mobile safety-testing operation meet Part 451?

Illinois Part 451 governs permits and operations for Official Testing Stations and Official Mobile Safety Testing Companies that perform covered safety inspections. The current rule includes permit and survey procedures, station and mobile-company operating requirements, tester qualifications, equipment, vehicle inspection reports, forms and records. Mobile testing companies must maintain an Illinois physical office and may perform safety tests only at the vehicle owner's place of business.

Quick check

Verify the correct IDOT permit, facility or mobile-company requirements, certified tester qualifications, inspection equipment, and required VIR/forms/records are all current.

At a glance
JurisdictionIllinois
TopicInspection / emissions
VerifiedOct 9, 2026
Review cadenceOngoing; review whenever IDOT/JCAR amends Part 451 or your testing location, permit, testers, or equipment changes.
When this applies

Your Illinois business operates or plans to operate an Official Testing Station or Official Mobile Safety Testing Company under 92 Ill. Adm. Code Part 451.

Confirm your IDOT permit and approved operation type match how you perform testing, that station or mobile-location requirements are met, certified testers and equipment comply with Part 451, and required inspection forms and records are maintained.

Official evidence

Source and verification

Verified
Oct 9, 2026
Applies to
Inspection / emissions, Dealership fixed ops, General mechanical, Mixed services

Quick-reference compliance planning only; not legal advice or an exhaustive statement of every applicable Federal, state, or local rule. Always verify the official source.

Regulatory history

Related Illinois changes

View state page →
EFFECTIVENov 13, 2025Illinois updated Part 451 and added Official Mobile Safety Testing Company requirementsIllinois businesses operating or considering an Official Testing Station or Official Mobile Safety Testing Company should review the…Open update →EFFECTIVENov 13, 2025Illinois expanded official vehicle safety-testing rules to mobile testing companiesIllinois businesses operating an Official Testing Station or Official Mobile Safety Testing Company should use the current Part 451 …Open update →EFFECTIVEMar 17, 2025Illinois restructured its emissions testing network with inspection-and-repair stationsChicago-area and Metro-East shops handling emissions failures should update the testing locations and options they give customers an…Open update →EFFECTIVEJan 1, 2022Illinois changed dealer warranty and recall reimbursement rulesFranchised service departments should review warranty/recall labor-time calculations, labor and parts reimbursement, diagnostic bill…Open update →