[1A(1)Subject to sub-paragraph (2), a vehicle is an exempt vehicle at any time if it was constructed [before 1st January 1973]].U.K.
(2)A vehicle is not an exempt vehicle by virtue of sub-paragraph (1) if—
(a)an annual rate is specified in respect of it by any provision of Part III, V, VI, VII or VIII of Schedule 1; or
(b)it is a special vehicle, within the meaning of Part IV of Schedule 1, which—
(i)falls within sub-paragraph (3) or (4); and
(ii)is not a digging machine, mobile crane, [mobile pumping vehicle,] works truck or road roller.
(3)A vehicle falls within this sub-paragraph if—
(a)it is designed or adapted for use for the conveyance of goods or burden of any description;
(b)it is put to a commercial use on a public road; and
(c)that use is not a use for the conveyance of goods or burden of any description.
(4)A vehicle falls within this sub-paragraph if—
(a)it is designed or adapted for use with a semi-trailer attached;
(b)it is put to a commercial use on a public road; and
(c)in a case where that use is a use with a semi-trailer attached, the semi-trailer is not used for the conveyance of goods or burden of any description.
(5)In sub-paragraph (2) “digging machine”, “mobile crane”[, “mobile pumping vehicle”] and “works truck” have the same meanings as in paragraph 4 of Schedule 1.
(6)In sub-paragraphs (3) and (4) “commercial use” means use for hire or reward or for or in connection with a trade or business.