Correct as at 26th April 2024. It may be superseded at any time.
Extract taken from: Vehicle Inspection Portal > VIRMs > Entry certification > Inspection and certification > Alternative fuel system
14 Alternative fuel system
14-1 Alternative fuel systems
Vehicles must comply with the requirements relating to mandatory equipment, condition and modification set out in the VIRM: In-service certification, section 13-3.
There are no additional requirements in respect of alternative fuel systems for the inspection and certification of vehicles for entry into service.