20The [1947 c. 42.] Acquisition of Land (Authorisation Procedure) (Scotland) Act 1947 (hereafter referred to as " the Act of 1947 ") shall apply to the compulsory purchase by the Corporation of land or rights in Scotland as if the Corporation were a local authority within the meaning of that Act, and as if this Act had been in force immediately before the commencement of that Act.