lines constituting the marking shown in diagram 1013 there shall be fitted studs incorporating reflectors:
Provided that,
(a) until the 31st December 1966 it shall not be necessary for the road markings shown in the diagrams 1013 and 1014 to be illuminated with reflecting material; and
(b) until the 31st December 1969 studs incorporating reflectors may be fitted either to the marking shown in diagram 1013 or along the length of or between the two lines constituting the marking.
(2) Subject to the foregoing provisions of this Regulation, any road marking may be illuminated with reflecting material and studs incorporating reflectors may be fitted to the markings shown in diagrams 1004 to 1007, 1010 and 1012.
(3) Reflectors incorporated in studs shall be white except that in the case of the reflectors fitted to the markings shown in diagrams 1010 and 1012 they may be red where the near side of the carriageway is indicated to drivers of approaching motor vehicles.
26.—(1) Road markings consisting only of studs and shown in either of the diagrams 1030 and 1031 shall not project above the surface of the carriageway in the immediate vicinity more than of an inch at their highest points nor more than of an inch at their edges.
(2) Road markings other than those referred to in the preceding paragraph shall not project above the surface of the carriageway in the immediate vicinity more than 1 of an inch.
(3) Studs incorporating reflectors fitted to any of the road markings in accordance with the last preceding Regulation may project above the surface of the carriageway in the immediate vicinity by not more than 1 inch at their highest points.
Section V
Miscellaneous Traffic Signs
27. Notwithstanding the provisions of Regulation 9 and subject to the succeeding paragraphs of this Regulation, signs placed temporarily on or near a road—
(a) for conveying to traffic
(i)information as respects deviations of, or alternative traffic routes,
(ii)information as respects the route which may conveniently be followed on the occasion of a sports meeting, exhibition or other public gathering, in each case attracting a considerable volume of traffic, or
(iii)warning of works being executed on or near a road or any obstruction on a road;
(b) for conveying to vehicular traffic any prohibition, restriction or requirement of a description required for the purposes of a temporary statutory provision; or
(c) pending the erection of any permanent sign prescribed by these Regulations, for conveying to traffic the indication which such a permanent sign indicates,
