Gauge of tramway and restrictions on working
15.—(1) The authorised tramway shall be constructed on a gauge of 1, 435 millimetres (4 feet 8.5 inches) and the motive power to be used shall be electrical energy or such other motive power as the Secretary of State may approve.
(2) No part of the authorised tramway shall be used for, or in connection with, the conveyance of passengers without the written permission of the Secretary of State and the undertaker shall comply with the conditions (if any) which the Secretary of State may from time to time prescribe for the safety of persons using the authorised tramway.
(3) Without prejudice to the generality of paragraph (2) above, traction cables of the overhead line equipment of the authorised tramway (supplied with 550 volts direct current with a positive feed), shall, unless otherwise agreed by the Secretary of State, be erected at a height of not less than 5.8 metres (19 feet) above the surface of the ground and, if at any place a height of less than 5.63 metres (18 feet 6 inches) above the surface of the ground is so agreed for a cable, the undertaker shall erect such traffic signs as may be directed by the Secretary of State to give warning of the cable.