1(1)The following are the undertakings protected by this Schedule, that is to say—
(a)the undertakings of the NRA, the Civil Aviation Authority, the British Coal Corporation and the Post Office;
(b)the undertaking of any water undertaker or sewerage undertaker;
(c)any undertaking consisting in the running of a telecommunications code system, within the meaning of Schedule 4 to the [1984 c. 12.] Telecommunications Act 1984;
(d)any airport to which Part V of the [1986 c. 31.] Airports Act 1986 applies;
(e)the undertaking of any public gas supplier within the meaning of Part I of the [1986 c. 44.] Gas Act 1986;
(f)the undertaking of any person authorised by a licence under Part I of the [1989 c. 29.] Electricity Act 1989 to generate, transmit or supply electricity;
(g)the undertaking of any navigation authority, harbour authority or conservancy authority;
(i)any public utility undertaking carried on by a local authority under any Act or under any order having the force of an Act.
(2)For the purposes of this Schedule any reference in this Schedule, in relation to any such airport as is mentioned in sub-paragraph (1)(d) above, to the persons carrying on the undertaking is a reference to the airport operator.