10. After regulation 13B there shall be inserted the following regulation—
13C.—(1) This regulation applies to a vehicle which—
(a)is a heavy motor car or a vehicle combination which consists of a heavy motor car drawing one trailer which is not a semi-trailer;
(b)was manufactured or, in the case of a vehicle combination, the part consisting of a heavy motor car, was manufactured after 31st May 1998; and
(c)is not a vehicle falling within any of the descriptions specified in paragraph (2).
(2) The descriptions of vehicle referred to in paragraph (1)(c) are—
(a)a vehicle having 4 or more axles where the distance between the foremost and rearmost axles exceeds 6.4 metres;
(b)a vehicle or a vehicle combination to which regulation 13, 13A or 13B applies;
(c)a vehicle constructed and normally used for the carriage of indivisible loads of abnormal length.
(3) Every vehicle to which this regulation applies shall be able to move on either lock so that, both with and without all its wheels in contact with the surface of the road and disregarding the things set out in paragraphs (a) to (m) in the definition of “overall width” and in paragraph (i)(a) to (o) in the definition of “overall length” in the Table in regulation 3(2), no part of it projects outside the area contained between concentric circles with radii of 12.5 m and 5.3 m.”