4. Section 4 of the Principal Act is amended by inserting in subsection (1) the following definitions:“ ‘trading stock', in relation to a vehicle dealer licensed under the Sale of Motor Vehicles Act 1977 or a corresponding law, means a vehicle offered or exposed for sale by the dealer in the course of the dealer's business, except a vehicle used—
(a) personally by the dealer or a member of the dealer's staff; or
(b) for the general purposes of the dealer's business;
(a) which was registered under the Motor Traffic Act or a corresponding law at some time prior to its acquisition by the dealer; or
(b) whose first registration (whether under the Motor Traffic Act or a corresponding law) was in the name of the dealer where, before being offered or exposed for sale, it was used—
(i) personally by the dealer or a member of the dealer's staff;
(ii) as a demonstration vehicle; or
(iii) for the general purposes of the dealer's business;”.