8. The Company’s railway shall be constructed to a nominal gauge of 1,435 millimetres, and the motive power on the railway shall be steam, electricity, internal combustion, or such other motive power as the Secretary of State may approve:
Provided that nothing in this Order shall authorise the Company to use electrical power as motive power on the Company’s 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 Company’s 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(1) or with telecommunication by means of such apparatus.