12For paragraph 5(1) of Part I of Schedule 4 to the Act of 1972 (special types of vehicles) there shall be substituted the following paragraph—
“(1)This paragraph applies to a goods vehicle—
(a)which has an unladen weight exceeding 1,525 kilograms ; and
(b)which is for the time being authorised for use on roads by virtue of an order under Article 29(3) of the Road Traffic (Northern Ireland) Order 1981 (authorisation of special vehicles).”