Road Traffic (Light Vehicle Standards) Rules 2018
Div 1Compliance with ADRs
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Division 1—Compliance with ADRs 21—Second edition ADRs (1) If a second edition ADR recommends that the ADR should apply to the design and construction of a vehicle, the vehicle must comply with the ADR. (2) If a second edition ADR contains a requirement for a type of equipment fitted to a vehicle built on or after a stated time, any equipment of the same type fitted to the vehicle after it is built must comply with— (a) the requirement as in force when the vehicle was built; or (b) if the requirement is amended after the vehicle is built and before the equipment is fitted—the requirement as in force— (i) when the vehicle was built; or (ii) when the equipment was fitted; or (iii) at any time between when the vehicle was built and the equipment was fitted. (3) However, a vehicle, or equipment fitted to a vehicle, need not comply with a recommendation or requirement of a second edition ADR if— (a) the recommendation or requirement is replaced by, or is inconsistent with, a requirement of either of the following (each a newer ADR): (i) a later version of the second edition ADR applying to the vehicle or equipment; (ii) a third edition ADR applying to the vehicle or equipment; and (b) the vehicle or equipment complies with the requirement of the newer ADR. (4) If a second edition ADR allows a vehicle built on or after a stated time to be fitted with equipment, a vehicle built before the time may also be fitted with the equipment. 22—Third edition ADRs (1) If a third edition ADR applies to the design and construction of a vehicle, the vehicle must comply with the ADR. (2) If a third edition ADR contains a requirement for a type of equipment fitted to a vehicle built on or after a stated time, any equipment of the same type fitted to the vehicle after it is built must comply with— (a) the requirement as in force when the vehicle was built; or (b) if the requirement is amended after the vehicle is built and before the equipment is fitted—the requirement as in force— (i) when the vehicle was built; or (ii) when the equipment was fitted; or (iii) at any time between when the vehicle was built and the equipment was fitted. (3) However, a vehicle, or equipment fitted to a vehicle, need not comply with a requirement of a third edition ADR if— (a) the requirement is replaced by, or is inconsistent with, a requirement of a later version of the ADR applying to the vehicle or equipment; and (b) the vehicle or equipment complies with the requirement of the later version. (4) If a third edition ADR allows a vehicle built on or after a stated time to be fitted with equipment, a vehicle built before the time may also be fitted with the equipment. The following table contains a list of some terms used in the third edition ADRs and the corresponding term used in the Light Vehicle Standards.
Third edition ADRs Light Vehicle Standards dipped‑beam headlamp low‑beam (for a headlight) front fog lamp front fog light rear fog lamp rear fog light wheelguard mudguard main‑beam headlamp high‑beam (for a headlight) reversing lamp reversing light direction indicator lamp direction indicator light stop lamp brake light rear registration plate lamp number plate light front position (side) lamp parking light rear position (side) lamp tail light end‑outline marker lamp front or rear clearance light external cabin lamp external cabin light internal lamp interior light side marker lamp side marker light daytime running lamp daytime running light rear reflex reflector, non‑triangular rear reflector front reflex reflector, non‑triangular front reflector side reflex reflector, non‑triangular side reflector