.A reception order made under this Chapter shall be sufficient authority

(i) for the applicant or any person authorised by him, or

(ii) in the case of a reception order made otherwise than on an application, for the person authorised so to do by the authority making the order,

(a) on the expiry of thirty days from the date on which it was made, unless within that period, the mentally ill person has been admitted to the place mentioned therein, and

(b) on the discharge, in accordance with the provisions of this Act, of the mentally ill person.