Chapters 173-422 and 173-422A WAC – Motor Vehicle Emission Inspection

On June 2, 2021, Ecology repealed Chapters 173-422 and 173-422A WAC, both called Motor Vehicle Emission Inspection. In 2005, the Legislature decided the vehicle emission inspection program would end Jan. 1, 2020. Ecology used the expedited rulemaking process since another law did not replace the vehicle emission inspection program.

Rulemaking timeline


Rule adoption phase (CR-103)

Adoption date:
June 2, 2021

Rule effective date:
July 2, 2021

Rule adoption documents:

Expedited rule proposal phase (CR-105)

Filing date:
Jan. 26, 2021

Rule proposal documents:

Deadline to submit an objection

Jan. 26, 2021 – April 5, 2021

Ecology proposed to repeal this rule under an expedited rulemaking process that did not include:

  • a public hearing
  • a small business economic impact statement
  • responses to the criteria for a significant legislative rule

Send an objection to using the expedited rulemaking process for these rules to:

    Katie Wolt, Agency Rules Coordinator
    Washington Department of Ecology
    Governmental Relations
    P.O. Box 47600
    Olympia, WA  98504-7600

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To request ADA accommodation for disabilities, or printed materials in a format for the visually impaired, contact Ecology's ADA Coordinator by email at, or call 360-407-6831. People with impaired hearing may call Washington Relay Service at 711. People with speech disability may call TTY at 877-833-6341.