The purpose of this proposal is to include the necessary transitional provisions to Supplement 4 to the 01 series of amendments to Regulation No. 101, in order to ensure consistency between the reference fuels prescribed in Regulation No. 83 (Emissions of M1 and N1 vehicles) and those prescribed in this Regulation.

European Commission presentation reviewing the issues involved with transposing GTR 15 into EU emissions and fuel consumption regulations and into UN R83 and UN R101. The EC proposes that WP.29 should transpose GTR 15 into a new “WLTP UN Regulation” that would supersede UN R83 and UN R101.