4Permitted deviation within limits
(1)Subject to subsection (2), in constructing or maintaining the scheduled works the authorised undertaker may—
(a)deviate laterally from the lines or situations shown on the Parliamentary plans within the limits of deviation for that work shown on those plans; and
(b)deviate vertically from the levels shown on the Parliamentary sections—
(i)in the case of Works Nos. 1 and 1A, upwards by a maximum of 7 metres;
(ii)in the case of any part of Work No. 2, 3A, 3B, 4, 4A, 5 or 6 which, at the date on which this Act comes into force, is on operational land of Edinburgh Airport, upwards by a maximum of 1 metre;
(iii)in the case of any part of Work No. 2, 3A, 3B or 5 which, at the date on which this Act comes into force, is on safeguarded airport land, upwards by a maximum of 1 metre or, with the agreement of EAL (which agreement shall not be unreasonably withheld), by a maximum of 3 metres from such levels;
(iv)in any other case, upwards by a maximum of 3 metres; and
(v)to any extent downwards.
(2)Subsections (1)(b)(ii), (iii) and (iv) do not apply to the ventilation shafts forming part of Works Nos. 2, 3A, 3B and 4.
(3)In this section “safeguarded airport land” means any land within the limits of deviation, the limits of land to be acquired or used or the limits of safeguarding which is within the land to the north of Edinburgh Airport (as existing at the date on which this Act comes into force) which is shown indicatively on the map of Edinburgh Airport included in paragraph 5.12 of the White Paper ‘The Future of Air Transport’ (December 2003, Cmd. 6046) and forms part of the land so shown within the possible new airport boundary.