Article 7 Gauge of railway and motive power

The railway shall be constructed and operated on a nominal gauge of 1.435 metres (4 feet 8 ½ inches) 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:

• Provided that nothing in this Order shall authorise the operators to use 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:

• Provided also that, 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.