Sch FIRST Pt I para 3
Subject as aforesaid a scheme approved or made as aforesaid shall be capable of coming into operation in accordance with the provisions of Part II of this Schedule unless— (1) either House of Parliament within a period of twenty-one days on which that House has sat after the scheme has been laid before it resolves that the scheme or some provision thereof ought not to come into operation; or (2) on a motion that a provision in the scheme be approved or that the scheme or some provision thereof ought not to come into operation an undertaking is given by, or on behalf of, the Minister to modify the scheme.