(2)  Such investigation may be held in the absence of the accused if the court is satisfied that owing to the state of the accused’s mind, it would be in the interests of the safety of the accused or of other persons or in the interests of public decency that he should be absent, and the court may receive as evidence a certificate in writing signed by a medical officer to the effect that the accused is in his opinion of unsound mind or is a proper person to be detained for observation and treatment in a psychiatric institution, or the court may, if it sees fit, take oral evidence from a medical officer on the state of mind of the accused.

(3)  If the court, on its own motion or on the application of the Public Prosecutor, is not satisfied that the person is capable of making his defence, the court shall postpone the inquiry or trial or other proceeding and shall order that person to be remanded for observation in a psychiatric institution for a period not exceeding one month.

(4)  The principal officer must keep the accused under observation and provide any necessary treatment during his remand and, before the expiry of that period, shall certify in writing to the court his opinion as to the person’s state of mind and if he is unable within that period to form any conclusion, shall so certify to the court and shall ask for a further remand, which may extend to a period of 2 months.