42. (1) The Housing Agency may appoint a person, including a member of its staff, to be an authorised officer, on such terms and conditions as it considers appropriate, for the purposes of this Act.

(2) A designated local authority may appoint a person, including a member of its staff, to be an authorised officer, on such terms and conditions as it considers appropriate, for the purposes of this Act.

(3) A person appointed to be an authorised officer shall be furnished with a certificate of his or her appointment and shall, when exercising a power conferred on him or her under this Act, if requested by a person affected by the exercise of the power to do so, produce the certificate, and a form of personal identification, to that person for inspection.

(4) An appointment under this section shall cease—

(a) when the appointment is revoked,

(b) if the appointment is for a fixed period, on the expiry of that period, or

(c) where the authorised officer is a member of the staff of the Housing Agency, or the designated local authority, when the person ceases to be a member of the staff.