Subject to the provisions of subsection nine of this section, while any order under this section for the detention of a patient in any institution or other place continues in force, the medical officer or other person in charge of the institution or place shall detain the patient or cause him to be detained in that institution or place, by force if necessary.”

If any person who is removed to or detained in any institution or other place pursuant to an order under this section leaves the institution or place while the order continues in force, then (without prejudice to any proceedings that may be taken against him or any other person in respect of an offence under this section) that person may be arrested by an officer of the Department of Health or by any member of the staff of that institution or place or by any constable without warrant and delivered’ forthwith, by force if necessary, to the same or another suitable institution or place. If in any such case the patient is delivered to any institution or place other than that to which the order relates, the person by whom he was arrested shall, as soon as may be practicable, cause him to be removed to the institution or place to which the order relates. Until he is so removed the institution or place to which he was so delivered shall be deemed for the purposes of this section to be an institution or place to which the order relates, and the provisions of this section shall apply accordingly.”