90Requirement about properly operating emission control

90 Requirement about properly operating emission control that is not fitted with an emission control system for each relevant emission if and as required by an applicable heavy vehicle standard. fitted with an emission control system that is not operating in accordance with the manufacturer’s design.

(3) A person must not use, or permit to be used, on a road a heavy vehicle fitted with an emission control system if the operation of the system results in a failure to comply with an applicable heavy vehicle standard (whether in relation to the vehicle or in relation to the system). (4) Subsections (2) and (3) do not apply to a heavy vehicle that— (a) is on a journey to a place for the repair of the emission control system or any of the vehicle’s components or equipment that affect the operation of the emission control system; and (5) The national regulations may prescribe testing standards for relevant emissions from heavy vehicles. emission control system means a device or system fitted to a heavy vehicle that reduces the emission of a relevant emission from the