Citizenship by naturalisation
127.—(1) Subject to clause (4), the Government may, upon application made by any person of or over the age of 21 years who is not a citizen of Singapore, grant a certificate of naturalisation to that person if the Government is satisfied —
(a) that he has resided in Singapore for the required periods and intends, if the certificate is granted, to do so permanently;
(b) that he is of good character; and
(c) that he has an adequate knowledge of the national language.

(4) No certificate of naturalisation shall be granted to any person until he has taken the Oath of Renunciation, Allegiance and Loyalty in the form set out in the Second Schedule.