the authorised development) of the A585 Windy Harbour to Skippool Highway  Development Consent Order 2020”.  26. —(1) The 1981 Act applies as if this Order were a compulsory purchase order.  (2) The 1981 Act, as applied by paragraph (1), has effect with the following modifications.  (3) In section 1 (application of Act) for subsection 2 substitute—  “(2) This section applies to any Minister, any local or other public authority or any other  body or person authorised to acquire land by means of a compulsory purchase order.”.  (4) In section 5( a ) (earliest date for execution of declaration), in subsection (2), omit the words  from “, and this subsection” to the end.  (5) Omit section 5A( b ) (time limit for general vesting declaration).  (6) In section 5B(1)( c ) (extension of time limit during challenge)—  (7) In section 6( d ) (notices after execution of declaration) in subsection (1)(b) for “section 15 of,  or paragraph 6 of Schedule 1 to, the Acquisition of Land Act 1981” substitute “section 134 (notice  of authorisation of compulsory acquisition) of the Planning Act 2008”.  (8) In section 7( e ) (constructive notice to treat) in subsection (1)(a), omit “(as modified by  section 4 of the Acquisition of Land Act 1981)”.  (9) In Schedule A1( f ) (counter-notice requiring purchase of land not in general vesting  declaration), omit paragraph 1(2).  (10) References to the 1965 Act in the 1981 Act are to be construed as references to the 1965  Act as applied by section 125 (application of compulsory acquisition provisions) of the 2008 Act  (and as modified by article 25 (modification of Part 1 of the 1965 Act) to the compulsory  acquisition of land under this Order.  27. —(1) The undertaker may acquire compulsorily so much of, or such rights in, the subsoil of  or of the airspace over the land referred to in paragraph (1) of article 20 (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) Where the undertaker acquires any part of, or rights in, the subsoil of or the airspace over  land referred to in paragraph (1), the undertaker is not required to acquire an interest in any other  part of the land.  (3) The following do not apply in connection with the exercise of the power under paragraph (1)  in relation to subsoil or airspace only—  ( a ) Section 5 was amended by paragraphs 4 and 6 of Schedule 15 to the Housing and Planning Act 2016 (c. 22).  ( b ) Section 5A was inserted by section 182(2) of the Housing and Planning Act 2016.  ( c )  Section 5B was inserted by section 202(2) of the Housing and Planning Act 2016.  ( d ) Section 6 was amended by section 4 of, and paragraph 52(2) of Schedule 2 to, the Planning (Consequential Provisions) Act  1990 (c. 11) and paragraph 7 of Schedule 15 to the Housing and Planning Act 2016 .  ( e )  Section 7(1) was substituted by Schedule 18 to the Housing and Planning Act 2016.  ( f )  Schedule A1 was inserted by paragraph 6 of Part 1 of Schedule 18 to the Housing and Planning Act 2016.  22 (a) Schedule 2A (counter-notice requiring purchase of land not in notice to treat) to the 1965  Act as modified by article 25 of this Order;  (a) for “section 23 of the Acquisition of Land Act 1981 (application to High Court in respect  of compulsory purchase order)” substitute “section 118 of the Planning Act 2008 (legal  challenges relating to applications for orders granting development consent)”; and  (b) for “the three year period mentioned in section 5A” substitute “the five year period  mentioned in article 22 (time limit for exercise of authority to acquire land compulsorily)  of the A585 Windy Harbour to Skippool Highway Development Consent Order 2020”.  Application of the 1981 Act  Acquisition of subsoil or airspace only 