4Effect of certain certificates of naturalisation
(1)Any document which on or after 1st January 1949 and before the passing of this Act was issued to a person by the Governor of British Guiana with the approval of the Secretary of State and which—
(a)purported to be a certificate of naturalisation, but
(b)did not contain a declaration that, upon taking the oath of allegiance within the time and in the manner required by the regulations made in that behalf, that person was to be a citizen of the United Kingdom and Colonies as from the date of the certificate,
shall have effect, and shall be deemed always to have had effect, as if (instead of any other declaration contained in the document) it had contained such a declaration as is specified in paragraph (b) of this subsection.
(2)Any document to which the preceding subsection applies shall have effect, and shall be deemed always to have had effect, as a certificate of naturalisation granted under section 10 of the British Nationality Act 1948, whether it purported to be granted under that Act or not.