//The obligation to use the safety belt when the vehicle is in motion is extended to all categories of vehicles and to all seats fitted with one (Directive 2003/20/EC). It related initially only to vehicles of less than 3.5 tonnes fitted with restraint systems and, for certain vehicles (coaches, light goods vehicles), did not apply to the back seats (Directive 91/671/EEC).//
雖然隔一段講佐可以適度豁免，你可以睇番#73引嘅例子，
只係豁免urban bus安裝。但若果架車有安裝，乘客就一定要戴。
英國國會文件甚至講明若果戴安全帶俾豁免，反而會易混淆及有漏洞。
//Certain exemptions may be granted, particularly in order to allow certain professional activities to be carried out efficiently, to ensure the proper functioning of activities relating to law-and-order, safety or emergency services, or to take account of the special conditions in certain types of transport.//
