No reserved provision shall be repealed or amended unless the proposal for the amendment or repeal—
(a)
is passed by a majority of 75% of all the members of the House of Representatives; or
(b)
has been carried by a majority of the valid votes cast at a poll of the electors of the General and Maori electoral districts:
provided that this section shall not apply to the repeal of any reserved provision by a consolidating Act in which that provision is re-enacted without amendment and this section is re-enacted without amendment so as to apply to that provision as re-enacted.