Paragraph 16
Orders in Council made under section 1 of the Motor Vehicles (International Circulation) Act 1952 and any regulations made under such Orders may extend to Northern Ireland for the purpose of making provision with respect to vehicle excise duty or the registration of vehicles.
Accordingly—
the references in section 1(1)(b) and 2(b) of that Act to Great Britain shall, in relation to such Orders or regulations as aforesaid which extend to Northern Ireland, be construed as including references to Northern Ireland;
in section 1 of that Act “enactment” shall be construed as including the Vehicles (Excise) Act (Northern Ireland) 1972;
an Order in Council under section 2 of that Act and regulations made under such an Order shall not make provision for any purpose for which an Order in Council or regulations mentioned in sub-paragraph (1) may extend to Northern Ireland.