The U.S. Environmental Protection Agency's (EPA) acting Administrator Andrew Wheeler has withdrawn the agency's previous decision to lift sales limits on glider kit trucks. The agency will revisit the regulations on gliders. 

Glider kit trucks are rebuilt from salvaged diesel engines fitted into new frames, and they emit 450 times more diesel particulate matter and up to 40 times more smog-forming nitrogen oxides than new trucks on the market, according to the EPA’s own analysis.

Earlier this month, the U.S. Court of Appeals suspended the July 6 EPA decision not to enforce the previous Phase 2 emissions standards placed on glider kit trucks that would put a 300-unit production cap on gliders.

According to a Reuters report, Wheeler said in a memo he “concluded that the application of current regulations to the glider industry does not represent the kind of extremely unusual circumstances that support the EPA’s exercise of enforcement discretion.”