sign may be varied and the sign is varied in accordance with that paragraph. the overall dimensions or the number or lines filled by the legend or both may be varied in so far as is necessary to give effect to that variation.
(3) In the sign shown in diagram 536 the number of bells shall be increased or decreased according to the width of the road over which it is placed, and in each of the signs shown in diagrams 534.1 to 535.1 the safe height shown on the sign shall be varied where necessary so that it is between 1 foot 6 inches and 2 feet less than the height of the lowest part of the overhead wire, of which it gives warning, over the highest part of the surface of the carriageway beneath the said wire.
(4) The signs shown in diagrams 732, 733, 734.3, 735 to 737.1, 739, 741 to 742.4, 743.1. 744.1, 805 (except when varied to convey a condition), 814, 820 to 822, 833 to 836 and 916.1, when erected in Wales may show the information contained on the sign in both the English and Welsh languages:
Provided that—
(a) except in the case of the signs shown in diagrams 743.1 and 744.1 names indicating the location of a place shall be those in common usage in the English language;
(b) any information shown on any such sign as is mentioned in this paragraph shall be shown in both the English and Welsh languages;
(c) one language version of each item of information shall be placed immediately above the other language version of that item; and
(d) on the same size lettering shall be used for each language version of each item of information.
(5) When a sign shown in diagrams 743.1, 744.1, 805, 814, 820 to 822 and 833 in 836 is varied in accordance with the last preceding paragraph, the overall dimensions as shown in the said diagrams may be varied in so far as is necessary to give effect to that variation.
(6) Where a sign shown in any diagram in Part III of Schedule 1 other than any of the diagrams 742.1 to 759 indicates a road or a route, and that road or route is temporarily closed, there may be affixed to the sign or to that part of the sign where where that road or route is indicated, so as to cancel temporarily the indication, a board coloured red and on which are inscribed in white characters the words "road temporarily closed" or "route temporarily closed".
13.—(1) Where as respects any diagram in Schedule 1 a dimension for the sign shown in the diagram is indicated in one or more sets of brackets against a dimension not indicated in brackets, any dimension indicated in a set or brackets may be treated as an alternative to the dimension nor so indicated.
(2) where a sign shown in any or the diagrams 606 to 614, 616 or 637 to 645 is placed temporarily on a road by a constable or a person acting under the instructions (whether general or specific) of the chief officer of police for the purposes of a temporary statutory provision any dimension specified for the sign in such a diagram may be reduced so long as any dimension shown in the diagram for measurement horizontally is not reduced to less than 200 millimetres.
(3) A sign shown in a diagram in Part III of Schedule 1 other than in diagrams 717, 726, 734.7 and 754 and a sign shown in a diagram in Part
