Article 7 Gauge and motive power

The railways shall be operated on the standard gauge of 1,435 millimetres (4 feet 8½ inches).

The motive power used on the railways shall be steam, diesel-electric, diesel, internal combustion, electric-battery or such other motive power as the Secretary of State may approve.

Nothing in this Order shall authorise the Society to use electrical power as motive power on the railways unless such power is obtained from storage batteries or from a source of generation entirely contained in and carried along with the engines and carriages.

If electrical power is used as motive power on the railways, such electrical power shall not be used in such a manner as to cause or be likely to cause any interference with any telecommunication apparatus as defined in Schedule 2 to the Telecommunication Act 1984^f1 or with telecommunication by means of any such apparatus.