Based on the outcomes of a European Commission study, proposal to clarify the text and align its provisions with other vehicle sound regulations, especially UN R41.

Based on the outcomes of a European Commission study, proposal to clarify the text and align its provisions with other vehicle sound regulations, especially UN R41, including to replace references to “two wheeled moped” with the term “L1 category vehicles” (and consequently to replace references to “moped” with “vehicle”) and to replace the term “noise” with “sound” (except for references to background noise) throughout the regulation. It proposes improved terminology and definitions, including new ones, improved sound emission testing conditions and procedures. It also introduces sound emission measurement through new testing of in use vehicles in motion.

Proposal to prohibit the use of a pause function for the acoustic vehicle alert system.

Proposal to clarify the regulation with regard to propulsion of the vehicle (replace the term “travel”), definition of the “pause function” (including taking into account the Japanese proposal to prohibit the use of a pause function), and provisions for deactivating AVAS coding in accordance with local market requirements and under conditions outside the scope of the regulation.

See document GRB-65-25 for detailed explanation.