25.—(1) The maximum length of an AILV or AILV-combination used to carry an abnormal indivisible load must not exceed 30 metres.
(2) The maximum length of an AILV or AILV-combination falling within any of sub-paragraphs (3) to (6) is to be determined in accordance with the sub-paragraph in question.
(3) Where the weight of the load rests wholly on an AILV that is a motor vehicle of category N3, the maximum length of the AILV is the overall length of the motor vehicle together with the length of any forward or rearward projection of the load.
(4) In the case of an AILV-combination that is configured so that the weight of the load rests wholly on a trailer of category O4, the maximum length of the AILV-combination is the overall length of the trailer together with the length of any forward or rearward projection of the load.
(5) In the case of an AILV-combination consisting only of a motor vehicle and a trailer, and which is configured so that the weight of the load rests on both vehicles (whether or not they form an articulated vehicle), the maximum length is the overall length of the trailer together with—
(a)the length of any projection of the load in front of the foremost part of the trailer; and
(b)the length of any rearward projection of the load.
(6) In the case of an AILV-combination (other than one falling within sub-paragraph (4) or (5)) which is configured so that that the weight of the load rests on at least two vehicles, the maximum length is the overall length of all the vehicles that bear the weight of the load together with—
(a)the length of any distance between them; and
(b)the length of any forward or rearward projection of the load.