Proposal for amendments to the draft Supplement 6 to the 03 series of amendments submitting clarifications to the text from the ASEP II informal group.

Proposal to align UN R51 with ISO 5130:2019 and thereby set requirements for the microphone position as a function of the exhaust outlet configuration.

Presentation on the status of the 2019 update to ISO 16254 (Acoustics – Measurement of sound emitted by road vehicles of category M and N at standstill and low speed operation – Engineering method). ISO 16254 specifies an engineering method for measuring the sound emitted by M and N category road vehicles at standstill and low speed operating conditions.