(1)In this Act " the appropriate Minister " means—
(a)in relation to statutory undertakers carrying on any railway, light railway, tramway, road transport, dock, harbour or pier undertaking, the Secretary of State for Transport;
(b)in relation to statutory undertakers carrying on an undertaking for the supply of electricity, gas or hydraulic power, the Secretary of State for Energy;
(c)in relation to the British Airports Authority or the Civil Aviation Authority or statutory undertakers carrying on any lighthouse undertaking, the Secretary of State for Trade;
(d)in relation to the Post Office or British Telecommunications, the Secretary of State for Industry;
(e)in relation to statutory undertakers carrying on an undertaking for the supply of water, in the application of this Act to Wales, the Secretary of State for Wales; and
(f)in relation to any other statutory undertakers, the Secretary of State for the Environment.
(2)References in this Act to the Secretary of State and the appropriate Minister have effect—
(a)as references to the Secretary of State and the appropriate Minister, if the appropriate Minister is not the one concerned as the Secretary of State; and
(b)as references to the one concerned as the Secretary of State alone, if he is also the appropriate Minister.
(3)If any question arises—
(a)in relation to anything required or authorised to be done under this Act as to which Minister is or was the appropriate Minister in relation to any statutory undertakers, that question shall be determined by the Treasury;
(b)in relation to the authorisation under this Act of a compulsory acquisition of land, whether land of statutory undertakers is operational land, that question shall be determined by the Secretary of State and the appropriate Minister.