(b) no declaration is to be executed under section 4( a ) (execution of declaration) of the 1981  Act as applied by article 31 (application of the 1981 Act),  (a) does not preclude the acquisition of such other rights and the imposition of such other  restrictive covenants in respect of the same land in accordance with Part 1 of Schedule 6  as may be required for the benefit of any other statutory undertaker; and  (b) must not be exercised by the undertaker in a way that precludes the acquisition of such  other rights and the imposition of such other restrictive covenants in respect of the same  land in accordance with Part 1 of Schedule 6 as are required for the benefit of any other  statutory undertaker.  ( a ) Section 4 was amended by sections 184, 185 and Schedule 18 paragraph 2 to the Housing and Planning Act 2016 (c. 22).  ( b ) Section 8 was amended by paragraphs 1 and 2 of Schedule 17 to the Housing and Planning Act 2016 and S.I. 2009/1307.  ( c )  Schedule 2A was inserted by paragraphs 1 and 3 of Schedule 17 to the Housing and Planning Act 2016.  27. —(1) The undertaker may acquire compulsorily so much of, or such rights over, the subsoil  beneath, or the surface of, or the airspace above, the land referred to in paragraph (1) of article 22  (compulsory acquisition of land) as may be required for any purpose for which that land may be  acquired under that provision instead of acquiring the whole of the land.  (2) In the case of the Order land specified in columns (1) and (2) of Schedule 8 (land in which  only airspace and new rights may be acquired) the undertaker’s powers of compulsory acquisition  under article 22 are limited to—  (5) Schedule 7 (modification of compensation and compulsory purchase enactments for creation  of new rights) has effect for the purpose of modifying the enactments relating to compensation and  the provisions of the 1965 Act in their application to the compulsory acquisition under this article  of a right over land by the creation of a new right or the imposition of a restrictive covenant.  (4) Subject to section 8( b ) (other provisions as to divided land) of, and Schedule 2A( c ) (counter- notice requiring purchase of land) to, the 1965 Act (as substituted by paragraph 5(8) of Schedule 7  (modification of compensation and compulsory purchase enactments for creation of new rights),  where the undertaker acquires a right over land or the benefit of a restrictive covenant under  paragraph (1), the undertaker is not required to acquire a greater interest in that land.  (3) The power under paragraph (1) to acquire the rights and to impose the restrictive covenants  described in Part 2 of Schedule 6 for the benefit of Cadent—  (2) In the case of the Order land specified in columns (1) and (2) of Part 1 (land in which only  new rights etc., may be acquired) and Part 2 (rights for the benefit of Cadent) of Schedule 6 (land  in which only new rights etc., may be acquired), the undertaker’s powers of compulsory  acquisition under paragraph (1) are limited to the acquisition of such wayleaves, easements, new  rights in the land or the imposition of such restrictive covenants as the undertaker may require for  or in connection with the authorised development for the purposes specified in the corresponding  entry in column (3) of Part 1 and Part 2 of Schedule 6 in relation to that land.  26. —(1) Subject to paragraph (2), the undertaker may acquire such rights over the Order land or  impose such restrictive covenants affecting the Order land, including rights and restrictive  covenants for the benefit of a statutory undertaker or any other person, as may be required for any  purpose for which that land may be acquired under article 22 (compulsory acquisition of land), by  creating them as well as acquiring rights already in existence.  (2) The authority conferred by article 33 (temporary use of land for carrying out the authorised  development) ceases at the end of the period referred to in paragraph (1), except that nothing in  this paragraph prevents the undertaker from remaining in possession of land after the end of that  period, if the land was entered and possession was taken before the end of that period.  in relation to any part of the Order land.  Compulsory acquisition of rights, etc.  Acquisition of subsoil and airspace only  24