17.—(1) Except as stated in paragraph 19, an AILV that falls within paragraph 3(a) or (b) may be used on roads only for, or in connection with—
(a)the carriage of an abnormal indivisible load; or
(b)the carriage of a load of exceptional width.
(2) Where the overall width of such an AILV exceeds 3 metres, it must not be used for, or in connection with, the carriage of any load except one that can only safely be carried on an AILV with an overall width exceeding 3 metres.
(3) The reference to the carriage of a load of exceptional width is to be construed in accordance with article 28(2).