2. In this Part of this Schedule—U.K.
“affected undertaker” means—
any licence holder within the meaning of Part 1 (electricity supply) of the 1989 Act;
a gas transporter within the meaning of Part 1 (gas supply) of the Gas Act 1986 M1;
a water undertaker within the meaning of the Water Industry Act 1991 M2; or
a sewerage undertaker within the meaning of Part 1 (preliminary) of the Water Industry Act 1991,
for the area of the authorised development but, for the avoidance of doubt, does not include the undertaker specified in Part 2 (National Grid) of this Schedule, and in relation to any apparatus, means the undertaker to whom it belongs or by whom it is maintained;
“alternative apparatus” means alternative apparatus adequate to enable the affected undertaker in question to fulfil its statutory functions in a manner not less efficient than previously;
“apparatus” means—
in the case of an electricity undertaker, electric lines or electrical plant (as defined in the 1989 Act), belonging to or maintained by that affected undertaker;
in the case of a gas undertaker, any mains, pipes or other apparatus belonging to or maintained by a gas transporter for the purposes of gas supply;
in the case of a water undertaker—
mains, pipes or other apparatus belonging to or maintained by that affected undertaker for the purposes of water supply; and
any water mains or service pipes (or part of a water main or service pipe) that is the subject of an agreement to adopt made under section 51A (agreements to adopt water main or service pipe at future date) of the Water Industry Act 1991;
in the case of a sewerage undertaker—
any drain or works vested in the affected undertaker under the Water Industry Act 1991; and
any sewer which is so vested or is the subject of a notice of intention to adopt given under section 102(4) (adoption of sewers and disposal works) of that Act or an agreement to adopt made under section 104 of that Act,
and includes a sludge main, disposal main (within the meaning of section 219 (general interpretation) of that Act) or sewer outfall and any manholes, ventilating shafts, pumps or other accessories forming part of any such sewer, drain or works, and includes any structure in which apparatus is or is to be lodged or which gives or will give access to apparatus;
“functions” includes powers and duties; and
“in” in a context referring to apparatus or alternative apparatus in land includes a reference to apparatus or alternative apparatus under, over or upon land.