WASHINGTON — To the Environmental Protection Agency, the trucking industry and clean air advocates, semi-trucks outfitted with glider kits represent a new front in the debate over government regulation. And this week happens to be a key week for deciding how and whether trucks like these can continue to be made and sold.

Dozens of representatives for trucking trade associations, health and environmental nonprofits, private citizens, truck dealers and manufacturers on Dec. 4 urged the U.S. Environmental Protection Agency not to repeal a provision in the 2016 Obama administration Phase 2 greenhouse gas reduction rule to regulate emissions requirements for glider kits.

The U.S. Environmental Protection Agency on Nov. 9 issued a proposed rule to repeal the Obama administration’s Medium- and Heavy-Duty Truck Phase 2 Greenhouse Gas Emission and Fuel Efficiency Standards for the glider industry.

The EPA has notified the Office of Management and Budget the agency intends to issue a proposed rule repealing the greenhouse gas Phase 2 emissions requirement for glider vehicles, glider engines and glider kits.