Proposed rule

Rulemaking contacts:

This proposed rulemaking is central to DEQ’s efforts to reduce harmful diesel engine exhaust and transportation-related greenhouse gas emissions. DEQ plans to propose new medium- and heavy-duty diesel engine standards adopted in California. Oregon is one of the Section 177 states that has opted in to California’s vehicle and truck emission standards. This rulemaking is proposing to adopt by reference a few of California’s rules including:

  • The Advanced Clean Trucks rule, which would require manufacturers of medium- and heavy- duty vehicles to sell a certain percentage of zero emission vehicles beginning with the 2024 vehicle model year.

  • The Heavy Duty Low NOx Omnibus rules which would require heavy duty vehicle manufacturers to comply with tougher NOx emission standards, overhaul engine testing procedures and further extend engine warranties to ensure NOx emissions are reduced.

  • Updates to the low emission vehicle (LEV program) rules to ensure they are identical to California’s current light duty vehicle emission standards.

Advisory committee

DEQ is convening an advisory committee to review the technical issues and fiscal impacts related to the proposed rules. In convening this committee, DEQ has appointed members that reflect the range of entities that are both directly and indirectly affected by proposed changes to the rules.

Public involvement

DEQ is holding a virtual meeting to provide background information and solicit early input from community members and stakeholders to help inform the development of this rulemaking.

Clean Trucks Rule Public Meeting 
Thursday, June 24, 2021 
10 a.m. – 11 a.m., PST

Meeting information

From a PC, Mac, iPad, iPhone or Android device:

  • Join online with Zoom
  • Join by phone: 
    1-888-475-4499 (Toll-free in the U.S.)
    Meeting ID: 875 5477 1380
    Passcode: 243241

Instructions for joining webinar or teleconference


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EQC action

Meeting has not yet been scheduled.