The U.S. House of Representatives voted 216-211 on Tuesday to approve a resolution blocking California's rules requiring ocean-going vessels to use shore power or equivalent emissions controls while docked at state ports.

The measure, House Joint Resolution 210 sponsored by Rep. Vince Fong (R-CA), uses the Congressional Review Act to overturn an Environmental Protection Agency waiver granted to California. The waiver had authorized the state's At-Berth regulation, which phases in requirements for ships to plug into shore power or capture exhaust emissions.

Supporters of the resolution argued that California's rules impose excessive burdens on the maritime industry and effectively set national policy from one state. Critics of the waiver said it disrupts federal authority and raises costs for shipping and port operations.

The At-Berth rule has been in place in phases since 2014, with updates extending requirements to additional vessel types. Proponents of the state regulation claim it reduces port pollution significantly, but the House action reflects broader Republican efforts to limit California's ability to set stricter environmental standards than federal rules.

The resolution now moves to the Senate, where a companion measure introduced by Sen. Dan Sullivan (R-AK) awaits consideration. A separate House vote is scheduled Thursday on another California waiver targeting commercial harbor craft emissions.

California ports have invested hundreds of millions of dollars in shore power infrastructure under the existing rules. The outcome in the Senate remains uncertain amid ongoing legal challenges over whether such waivers qualify as rules subject to the Congressional Review Act.