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 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.