V of that schedule other than in any or the diagrams 901.1, 910, 912 to 915, and 916.1 to 920 shall be of such dimensions having regard to the character of the road and the speed of the vehicular traffic generally using it as are necessary to accommodate any place name, route symbol, route number, arrow, any indication of distance or any other indication which in accordance with these regulations may be shown therein and it is appropriate to show for the purpose for which the sign is placed on a road.
14. Subject to the provisions of paragraphs (2) to (4) of this Regulation, and without prejudice to Regulation 12(1)(l) (variant requirements to signs there specified), all letters incorporated in the signs shown in the diagrams in Schedule 1 other than in diagrams 742.1 to 742.4, 828.1 and 349 to 852 shall have the proportions and form shown in either Part I, Part II, Part V or Part VI of Schedule 7, all numerals incorporated in the signs shown in the diagrams in Schedule 1 shall have the proportions and form shown in Part III or Part VII of Schedule 7 and all other characters incorporated in the signs shown in the diagrams in schedule 1 shall have the proportions and form shown in Part IV or Part VIII of Schedule 7.
(2) Letters and numerals used for the purposes of indicating a route number on the sign shown in diagram 757 and on any sign shown in a diagram in Part V of schedule 1 shall have the proportions and form shown in Part IX of Schedule 7.
(3) Any arrow to be used in any of the signs shown in diagrams 703.3, 718.3 or 908.2 when those signs are erected over the carriageway on structures on which there is also mounted equipment for displaying the signs shown in diagram 6021 in Schedule 5 shall have the proportion and form of the arrow shown in the last diagram of Part IV of Schedule 7 and any such arrow to be used in any of the signs first above-mentioned when those signs are erected over the carriageway on structures on which no such equipment is also mounted shall have the proportion and form of the arrow shown in the penultimate diagram in the said Part IV.
(4) Subject to and within the limits of any dimension specified as maximum or minimum in diagrams 743.1 and 744.1, any letters, numerals or other characters incorporated in those diagrams may have proportions and forms other than those proportions and form shown in any Part of Schedule 7.
15.—(1) In this Regulation (except in paragraph as respects the sign shown in diagram 828.l) and in Regulations 16 and 17 the references to lighting shall be construred as references to steady lighting
(2) Subject to the provisions of paragraph (7), this paragraph applies to the signs shown in diagrams 606, 609 to 616, 617 (except when used with the sign shown in diagram 613), 619, 619.1, 621 to 622.2 and 622.4 in construing are following sub-paragraphs—
(a) when the signs shown in diagrams one and 512 to 614 are fixed to light signals prescribed by Regulation 31, or by Regulation 31 as varied by Regulation 32, they shall be illuminated by a means of internal lighting at all times except when the light signals in which they are fixed are being maintained or repaired;
