Proposal to align UN R115 with UN R83, replacing FC_mean with FC_norm as defined in UN R101. FC_mean, as defined in paragraphs 6.1.2.4.3.2. (LPG) and 6.2.2.4.3.2. (CNG) of UN Regulation No. 115, is the mean value of the fuel consumption of all the parent (test) vehicles, whereas the calculation of the gas ratio has to be made individually for each parent vehicle.

Proposal to simplify the communication model of approval under UN Regulation No. 115.

Proposal to align UN R115 with the GTR No. 15 WLTC test cycle.

Proposal to list conditions, especially with regard to retrofit systems, under which indirect and direct injection vehicles may be considered as belonging to the same vehicle family. Gasoline direct injection vehicles which operate in indirect gas injection mode should be listed in the same family as indirect gasoline injection vehicles, as the applied gas injection technology is the same and provided that at least one such vehicle is tested as parent vehicle according to the requirements of this Regulation.

Proposal to correct errors identified in the text of Supplement 8 (document WP.29/2019/45) as adopted by the World Forum.

GRPE proposal to clarify that the correct procedure for a type I test of a hybrid electric vehicle under UN R115 shall take into account Annex 14 of UN R83.

Proposal to enable approval of vehicles equipped with an Automated Driving System under this Regulation.