21.—(1) The undertaker must not exercise the powers conferred by articles 20 (discharge of water), 22 (authority to survey and investigate land), 23 (compulsory acquisition of land), 26 (compulsory acquisition of rights and restrictive covenants), 27 (private rights over land), 30 (acquisition of subsoil or air-space only), 31 (rights under or over streets), 32 (temporary use of land for carrying out the authorised development), 33 (temporary use of land for maintaining the authorised development), 34 (statutory undertakers), 37 (felling or lopping of trees and removal of hedgerows) or the powers conferred by section 11(3) (powers of entry) of the 1965 Act or by section 203 (power to override easements and rights) of the Housing and Planning Act 2016 M1 in respect of any railway property and leasehold interests forming part of parcels 3/10c, 3/10d, 3/10e, 3/10f, 3/10g, 3/10i, 3/12a, 3/12b, 3/12c, 3/12d, 3/12e and 3/12f unless the exercise of such powers is with the consent of Network Rail.E+W+S
(2) The undertaker must not in the exercise of the powers conferred by this Order prevent pedestrian or vehicular access to any railway property, unless preventing such access is with the consent of Network Rail.
(3) The undertaker must not exercise the powers conferred by sections 271 (extinguishment of rights of statutory undertakers: preliminary notices) or 272 (extinguishment of rights of telecommunications code system operators: preliminary notices) of the 1990 Act, or article 34 (statutory undertakers), in relation to any right of access of Network Rail to railway property, but such right of access may be diverted with the consent of Network Rail.
(4) The undertaker must not under the powers of this Order acquire or use, or acquire new rights over, or seek to impose any restrictive covenants over, any railway property, or extinguish any existing rights of Network Rail in respect of any third party property except with the consent of Network Rail.
(5) Where Network Rail is asked to give its consent under this paragraph, such consent must not be unreasonably withheld but may be given subject to reasonable conditions.