United Nations regulations

In April 1990, the United Nations published regulation ECE 83, uniform provisions concerning the approval of vehicles regarding the emission of pollutants according to engine fuel requirements. UN ECE 83 has been revised many times to accommodate tightening emission standards.

The latest regulation, UN ECE 83-07, from 2015, mainly establishes the technical requirements for the type-approval of light-duty vehicle (LDV) categories M1, M2, N1 and N2 with a reference mass of up to 2,610 kg, and rules for in-service conformity, durability of pollution control devices and on-board diagnostic (OBD) systems.

In general, it is mainly aligned with Euro 6 emission standards, including the addition of emission standards for hydrogen and hydrogen-enriched natural gas (H2NG) veh