英國國會嘅文件更明言，若果按情況決定需唔需要戴，會出現漏洞(loop hole)
//In Great Britain, vehicles used for local transport in urban and built-up areas, or in
which standing is allowed, are not normally fitted with seat belts so we see no need to
adopt the first of these exemptions. We consider it would be confusing and provide a
potential loophole if there were certain occasions when a seat belt did not have to be
worn if one was available. The second exemption relates to what is known as the "3 for
2" concession which allows 3 children to use 2 seats on buses. This concession does
not apply in Great Britain in vehicles where seat belts are available and we have no
plans to apply it. However, we would be pleased to have your views on whether any
exemptions should be permitted and, if so, how they should be framed.//
