Global Technical Regulation No. 23
Measurement Procedure for Two- and Three-wheeled Vehicles Equipped with a Combustion Engine with Regard to Durability of Pollution-control Devices.
Resolution (RE7)
Consolidated Resolution Concerning Exhaust Ultra-fine Particle Number Measurement for Heavy Duty Engines.
Regulation No. 132-01
Retrofit Emission Control Devices (REC) for Heavy Duty Vehicles, Tractors and Non-road Mobile Machinery Equipped with Compression Ignition Engines.