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CARB issues 15-day notice of modified text for proposed amendments to Advanced Clean Fleets and LCFS (public comment period opened)

California Air Resources Board — Advanced Clean Fleets (ACF) Regulation; Low Carbon Fuel Standard (LCFS) RegulationCalifornia Air Resources BoardCalifornia (US)
Announced

Apr 2, 2026

Description

CARB published a Notice of Public Availability of Modified Text ("15-day changes") for proposed amendments to the Advanced Clean Fleets (ACF) and Low Carbon Fuel Standard (LCFS) regulations. The notice summarizes proposed adjustments including removal of ePTO-related definitions/requirements (because related provisions were removed), definitional updates (e.g., good engineering judgement; Low-NOx ICE Vehicle), added flexibility to switch between ACF compliance options (ZEV Milestones vs. ZEV Purchase Schedule) until January 1, 2030 (with conditions), and revisions to ZEV purchase schedule timing (including language described as delaying a 100% ZEV purchase requirement from 2027 to 2030 for certain fleets). The notice also states that the Sept. 25, 2025 Board action repealed certain ACF fleet requirements (Drayage, High Priority, and Federal Fleet requirements). Compliance teams for affected fleets/fuel program participants should review the modified text and submit comments within the 15-day window.

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CARB issues 15-day notice of modified text for proposed amendments to Advanced Clean Fleets and LCFS (public comment period opened) | Certivo Regulations