Prisoners who are mentally disordered
43.—(1)  Whenever a prisoner undergoing a sentence of imprisonment appears to the Commissioner on the certificate of a registered medical practitioner to be mentally disordered, the Commissioner may, by written order, setting forth the grounds of belief that the prisoner is mentally disordered, direct the prisoner’s removal from any prison to any mental hospital or other fit place of safe custody within Singapore, there to be kept and treated as the Commissioner directs —
(a)until the expiry of the term of imprisonment ordered by the sentence; or
(b)if it is certified by a medical officer that it is necessary for the safety of the prisoner or of others that he or she should be detained under medical care and treatment, until he or she is discharged according to law.
[33/2004; 21/2008; 1/2014]
(2)  When it appears to the Commissioner on the certificate of a registered medical practitioner that such prisoner has ceased to be mentally disordered, the Commissioner must, by a written order, return the prisoner to the prison from where the prisoner was removed if his or her term of imprisonment has not expired, but if the term has expired, must direct him or her to be discharged.
[33/2004; 21/2008; 1/2014]
(3)  Where a person is confined under this section in a psychiatric institution within the meaning of the Mental Health (Care and Treatment) Act 2008, section 15 of that Act applies to such person after the expiry of the term of imprisonment to which the person has been sentenced, and the time during which he or she is so confined is reckoned as part of such term.
[21/2008]