When the head of a treatment facility or unit considers it in the best interest of a patient he may permit the patient to leave the facility on a temporary leave of absence, which may be for a period of time as the head of the treatment facility or unit determines.

The head of the treatment facility or unit upon releasing a patient on a temporary leave of absence may impose conditions in relation to the patient while he is absent from the facility as are proper and in the best interest of the patient and the public welfare.