The Act of 1952 is hereby amended, as respects licences under section 1 thereof taken out for periods beginning on or after the 1st day of January, 1993, by the substitution of the following subparagraph for subparagraph (c) (inserted by section 75 of the Finance Act, 1971) of paragraph 2 of Part I of the Schedule thereto:

"(c) Any vehicle (other than a vehicle constructed or adapted for use and used for the conveyance of a machine, workshop, contrivance or implement, by or in which goods being conveyed by such vehicle are processed or manufactured while the vehicle is in motion) constructed or adapted for use and used only for the conveyance of a machine, workshop, contrivance or implement (being a machine, workshop, contrivance or implement which is built in as part of the vehicle or otherwise permanently attached thereto) and no other load except articles used in connection with such machine, workshop, contrivance or implement or goods processed or manufactured therein including any vehicle (commonly known as a recovery vehicle) constructed or permanently adapted for the purposes of lifting, towing and transporting a disabled vehicle or for any one or more of those purposes.......... £50.".