Article 7 Gauge of railway and motive power

The railway shall be constructed and operated on a nominal gauge of 610 millimetres (2 feet) and the motive power 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 use of electrical power as motive power on the railway 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 railway, such electrical power shall not be used in such a manner as to cause or be likely to cause any interference with any telecommunications apparatus (as defined in Schedule 2 to the Telecommunications Act 1984)^f1 or with telecommunication by means of such apparatus.