120Acquisition of land for purposes of exchange
Without prejudice to the generality of the powers conferred by the preceding provisions of this Part of this Act, any power of a local authority to acquire land thereunder, whether compulsorily or by agreement, shall include power to acquire land required for giving in exchange—
(a)for land appropriated under section 121 of this Act; or
(b)for Green Belt land, within the meaning of the [1938 c. xciii.] Green Belt (London and Home Counties) Act 1938, appropriated in accordance with that Act for any purpose specified in a development plan.