law: 48. Admission, detention and retaking in certain cases.-
  Every person brought into a psychiatric hospital or psychiatric nursing home under any order made under this Act, may be detained or, as the case may be, admitted as an inpatient therein until he is removed or is discharged under any law, and in case of his escape from such hospital or nursing home he may, by virtue of such order, be retaken by any police officer or by the medical officer in charge or any officer or servant of such hospital or nursing home, or by any other person authorised in that behalf by the medical officer in charge, and conveyed to, and received and detained or, as the case may be, kept as an inpatient in such hospital or nursing home: Provided that in the case of a mentally ill person (not being a mentally ill prisoner) the power to retake as aforesaid under this section shall not be exercisable after the expiry of a period of one month from the date of his escape.