Any Act of the Parliament of Northern Ireland having effect for purposes similar to all or any of the purposes of this Act may repeal or alter, in its application to Northern Ireland, any such enactment as follows, that is to say—
notwithstanding that the enactment was passed after the appointed day for the purposes of section six of the Government of Ireland Act, 1920, or relates to matters with respect to which that Parliament have not, apart from this subsection, power to make laws.
.Save as expressly provided therein, the provisions of this Act other than the last foregoing subsection shall not extend to Northern Ireland