4In relation to any application for registration made under subsection (6) of section twelve of the said Act of 1948 by a citizen of the Republic, paragraph (a) of subsection (1) of section three of the British Nationality Act, 1958 (which prescribes the time within which such applications may be made) shall have effect as if for the words " nineteen hundred and sixty-two " there were substituted the words " nineteen hundred and sixty-five " ; and for the purposes of any such application the references in the said subsection (6) to the United Kingdom and Colonies (other than references to citizenship of the United Kingdom and Colonies) shall be construed as including references to the protectorates of Bechuanaland and Swaziland.