6.—(1) The crossing signs shown in diagrams 102, 106, 157, 160, 161, 162 and 164 in Schedule 1 may be varied as set out in Schedule 1 where the circumstances so require.
(2) A crossing sign shown in diagrams 104 and 118 in Schedule 1 may be varied to show a different penalty where the maximum penalty for failing to comply with the requirement on the crossing sign has changed.
(3) In relation to a crossing sign shown in diagrams 106 (variant B), 120, 121, 140, and 164 (variants B, C and D) in Schedule 1, the telephone number may be changed if the number of the signaller changes.
7.—(1) 7. —(1) Subject to paragraph (2), the front of a crossing sign shown in the diagrams in Schedule 1 must be covered in retroreflecting material.
(2) Retroreflecting material must not be applied to—
(a) any part of a crossing sign, including words, coloured black;
(b) the red and green lights prescribed in regulation 8 in a crossing sign shown in a diagram in Part 4 of Schedule 1; and
(2) a crossing sign at a crossing which motor vehicles do not use.
8.—(1) The crossing signs shown in diagrams 158, 159, 160 and 161 in Part 4 of Schedule 1 must contain red and green lights which—
(a) are internally illuminated by a steady light so that—
(i)when one light is lit, the other is not;
(ii)the green light is and remains lit so long as no railway or tramway vehicle is approaching the vicinity of the crossing from either direction; and
(iii)the red light is and remains lit if the green light is not lit; or
(b) are activated either by the user pushing a button, or by a motion sensor so that—
(i)when one light is lit, the other is not;
(ii)the green light is only activated so long as no railway or tramway vehicle is approaching the vicinity of the crossing from either direction; and
(iii)the red light is and remains activated until the green light is lit.
(2) The lenses of the lights must be—
(a) circular and not less than 60 millimetres in diameter; or
(b) rectangular with the short side measuring a minimum of 60 millimetres; and the distance between the edges of the lenses of the lights must be not less than 40 millimetres.
(3) The information, warnings, requirements and prohibitions conveyed by the lights described in paragraphs (1) and (2) are—
(a) the red light when lit warns the user of a crossing that a railway or tramway vehicle is approaching the vicinity of that crossing and users are prohibited from using the crossing;
(b) the green light when lit informs the user of a crossing that no railway or tramway vehicle is approaching the vicinity of that crossing and users may use the crossing;
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