[18(1)In this Part “island goods vehicle” means any goods vehicle which—U.K.
(a)is kept for use wholly or partly on the roads of one or more small islands; and
(b)is not kept or used on any mainland road, except in a manner authorised by sub-paragraph (2) or (3).
(2)The keeping or use of a goods vehicle on a mainland road is authorised by this sub-paragraph if—
(a)the road is one used for travel between a landing place and premises where vehicles disembarked at that place are loaded or unloaded, or both;
(b)the length of the journey, using that road, from that landing place to those premises is not more than five kilometres;
(c)the vehicle in question is one which was disembarked at that landing place after a journey by sea which began on a small island; and
(d)the loading or unloading of that vehicle is to take place, or has taken place, at those premises.
(3)The keeping or use of a goods vehicle on a mainland road is authorised by this sub-paragraph if—
(a)that vehicle has a revenue weight not exceeding 17,000 kilograms;
(b)that vehicle is normally kept at a base or centre on a small island; and
(c)the only journeys for which that vehicle is used are ones that begin or end at that base or centre.
(4)References in this paragraph to a small island are references to any such island falling within sub-paragraph (5) as may be designated as a small island by an order made by the Secretary of State.
(5)An island falls within this sub-paragraph if—
(a)it has an area of 230,000 hectares or less; and
(b)the absence of a bridge, causeway, tunnel, ford or other way makes it at all times impracticable for road vehicles to be driven under their own power from that island as far as the mainland.
(6)The reference in sub-paragraph (5) to driving a road vehicle as far as the mainland is a reference to driving it as far as any public road in the United Kingdom which is not on an island with an area of 230,000 hectares or less and is not a road connecting two such islands.
(7)In this paragraph—
“island” includes anything that is an island only when the tide reaches a certain height;
“landing place” means any place at which vehicles are disembarked after sea journeys;
“mainland road” means any public road in the United Kingdom, other than one which is on a small island or which connects two such islands; and
“road vehicles” means vehicles which are designed or adapted primarily for being driven on roads and which do not have any special features for facilitating their being driven elsewhere;
and references in this paragraph to the loading or unloading of a vehicle include references to the loading or unloading of its trailer or semi-trailer.]