(1)References in this Act to a traffic area constituted for the purposes thereof by a particular designation are references to the area described by that designation on the signed maps whose boundary is delineated thereon by a red line.
(2)Subsection (1) above has effect subject to the powers of the Secretary of State under section 3 of this Act to vary the provisions of this Act constituting traffic areas; and if, by virtue of subsection (3) of that section, an order thereunder provides for substituting, for any of the signed maps, maps authenticated as provided by the order and showing the areas to which the order relates as constituted in accordance with the provisions of the order, the substituted maps shall be deemed to be included among the signed maps in place of those for which they were substituted.
(3)In this section " the signed maps " means the maps contained in the three sets of books signed by the Chairman of the Joint Committee of the House of Lords and the House of Commons to which the Bill for the [1960 c. 16.] Road Traffic Act 1960 was referred, of which one set was deposited in the Office of the Clerk of the Parliaments, one in the Private Bill Office of the House of Commons and one at the Ministry of Transport.
(4)The signed maps, and any substituted therefor by virtue of section 3 of this Act, shall be for all purposes conclusive evidence of the extent of the respective areas whose boundaries are delineated thereon; and a copy of any such map purporting to be printed under the superintendence or authority of Her Majesty's Stationery Office shall be of equal validity with the original.