Every vehicle propelled by an internal combustion engine shall be fitted with an exhaust system including a silencer and the exhaust gases from the engine shall not escape into the atmosphere without first passing through the silencer.

Every exhaust system and silencer shall be maintained in good and efficient working order and F1shall not after the date of manufacture be altered so as to increase the noise made by the escape of exhaust gases.

Instead of complying with paragraph (1) a vehicle may comply with Community Directive 77/212, 81/334, 84/372 F2, 84/424 or 92/97 or ECE Regulation 51.02 or, in the case of a motor cycle other than a moped, 78/1015 F3, 87/56 or 89/235.

In this regulation “moped” has the meaning given to it in paragraph (5) of Schedule 9.