13.—(1) A globe must be internally illuminated by a flashing light except that, where sub-paragraph (2) applies, it may be a steady light.
(2) This sub-paragraph applies where—
(a)in relation to a globe placed in England and Wales, the Secretary of State; or
(b)in relation to a globe placed in Scotland, Scottish Ministers,
has or have given authorisation in writing for the light to be steady.
(3) Where a globe is mounted on or attached to or mounted on a post, whether or not specially provided for the purpose—
(a)the post must be coloured in alternate black and white bands with the lowest band being coloured black;
(b)the width of the bands must be not less than 275 mm, nor more than 335 mm, save that the lowest band may be of a width of not more than 1 metre; and
(c)the post may be internally illuminated.
(4) A globe, or the post on which it is mounted, may be fitted with all or any of the following—
(a)a backing board or other device designed to improve the conspicuousness of the globe;
(b)a shield or other device designed to prevent or reduce light shining into adjacent premises; or
(c)a light to illuminate the crossing.