Implementation of a mobile source emission control programme for light-duty vehicles , light-duty trucks , heavy-duty trucks and fuels to the extent required by sections 202 ( a ) , 202 ( g ) and 202 ( h ) of the Clean Air Act , as implemented through : ( a ) 40 Code of Federal Regulations ( C.F.R . ) Part 80 , Subpart D - Reformulated Gasoline ; ( b ) 40 C.F.R . Part 86 , Subpart A - General Provisions for Emission Regulations ;