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Heavy-Duty Engine and Vehicle Omnibus Rule Update 2024

Adopted rule

Administrative Order No.: DEQ-10-2024
Filed and Effective: July 15, 2024
See Oregon Bulletin, August 2024

Rulemaking contact: Eric Feeley, 503-915-2798

This rulemaking adopted California Air Resources Board amendments to heavy-duty engine and vehicle exhaust emission standards to maintain identicality with CARB rules for new medium- and heavy-duty vehicles sold in Oregon. This rulemaking also adopted a 1-year implementation delay which replaced the temporary rule adopted by the EQC on Nov. 16, 2023. This action provides manufacturers and buyers compliance certainty and add additional flexibilities to the legacy engine sales allowances for engine model year 2025 and 2026.

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

Meeting 1: April 11, 2024

Public involvement

The comment period closed at 4 p.m. on June 24, 2024.

For more information, see the Notice of Proposed Rulemaking, which includes the notice and proposed rules.

DEQ held a public hearing on June 17, 2024

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EQC action

At the 430th Oregon Environmental Quality Commission meeting on Jan. 24, 2024, the Environmental Quality Commission authorized delegation to Director Leah Feldon for the 2024 Heavy-Duty Engine and Vehicle Omnibus Rule Update rulemaking. Director Feldon approved the staff report and adopted these rules on July 3, 2024.