HB 1556 Maryland House of Delegates · 2025 Regular Session

Environment - Advanced Clean Cars II Program and Advanced Clean Trucks Program - Implementation, Application, and Enforcement

HB 1556 delays Maryland's implementation of the Advanced Clean Trucks Program until a required needs assessment and deployment plan is published. It prohibits the Department of the Environment from enforcing penalties against motor vehicle manufacturers for failing to meet 2027 and 2028 model year requirements under California's Advanced Clean Trucks regulations, unless manufacturers representing 40% of the state's market share agree to enforcement terms. The bill extends the deadline for publishing the needs assessment to December 1, 2025 (with implementation starting in 2028 if met) or 2026 (starting in 2029 if missed). This directly affects vehicle manufacturers and the state agency responsible for environmental regulations.

Bill status passed 3 of 5 stages cleared

Introduction

Mar 2025

Committee Review

Apr 2025

House of Delegates Passage

Apr 2025

Senate Passage

Governor

Introduced Mar 5, 2025 Last action Apr 4, 2025

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What changed between versions

First - Environment - Advanced Clean Cars II Program and Advanced Clean Trucks Regulation - Application and Enforcement → Third - Environment - Advanced Clean Cars II Program and Advanced Clean Trucks Program - Implementation, Application, and Enforcement · 5 edits

MODERATE

This bill was re-referred to the Environment and Transportation committee and amended to address delays in implementing the Advanced Clean Trucks Program. The changes clarify that the Department of the Environment cannot implement the program until a needs assessment and deployment plan is published, with implementation dates shifting to 2028 or 2029 depending on when the plan is released. The bill also adds new requirements for the Department to prepare a comprehensive needs assessment covering infrastructure, incentives, and fleet transition timelines.

Scope change

The bill's scope expanded from a narrow focus on enforcement prohibitions to include broader implementation requirements and conditions for the Advanced Clean Trucks Program.

TIMELINE

Added a requirement that the Department of the Environment cannot implement Advanced Clean Trucks regulations until a needs assessment and deployment plan is published.

Changed implementation start dates from 2027-2028 to 2028-2029, depending on when the needs assessment is published (before or after December 1, 2025).

REQUIREMENT

Added new requirements for the Department to prepare a needs assessment and deployment plan covering infrastructure capacity, charging/refueling stations, purchase incentives, and fleet transition models.

ENFORCEMENT

Modified enforcement provisions to prohibit applying penalties to manufacturers for failing to meet requirements under certain circumstances, rather than a blanket prohibition.

SCOPE

Added references to federal Executive Order 14154 and potential withholding of federal funding as context for the bill's provisions.

Floor votes

How they voted

This bill passed the House of Delegates by voice vote (no roll call recorded).

Full legislative history

Actions timeline

Total actions

Key actions

Committee

Apr 3, 2025

Lower · Passed

Motion Special Order until Later This Session (Delegate M. Morgan) Adopted

lower

Apr 3, 2025

Lower · Passed

Favorable with Amendments {

lower

Apr 3, 2025

Lower · Passed

Favorable with Amendments Report by Environment and Transportation

lower

Mar 6, 2025

Committee

Rereferred to Environment and Transportation

lower

Mar 5, 2025

Committee

Referred Rules and Executive Nominations

lower

Mar 5, 2025

Introduced

Motion Rules Suspend for Late Introduction (Delegate Korman) Adopted

lower

Feb 26, 2025

Committee

First Reading House Rules and Executive Nominations

lower

1 primary · 0 co-sponsors