There are detailed rules governing the manufacture and subsequent maintenance of motor vehicles, failure to comply with which may constitute a criminal offence. The main rules deal with such matters as the brakes and steering system, mirrors, windscreen wipers and washers, petrol tanks, door hinges and latches, silencers, pollution prevention, indicators, speedometers, lights, and tyres. There are also regulations governing the use of a motor vehicle. Breach of the regulations relating to brakes, steering system, or tyres or breach of any of the regulations relating to construction, maintenance, or use in a manner that causes or is likely to cause danger is an offence punishable by endorsement (and carrying 3 penalty points under the totting-up system) and discretionary disqualification. Other breaches are subject to fines but not to endorsement. There are also special offences relating to the sale or attempted sale of vehicles whose use on the roads would be a breach of the regulations, to the fitting of parts to a vehicle in such a way that its subsequent use would be in breach of the regulations, and to selling or supplying parts whose fitting would cause the vehicle's subsequent use to be in breach of the regulations. These offences do not apply, however, if the defendant proves that the vehicle was sold for export or that he reasonably believed that it would not be used in Britain in an unlawful condition. See also MOT test.