(1) The Ombudsman may make a written arrangement with the Ombudsman of the Commonwealth or a State, or 2 or more of them, in relation to the investigation by 1 or more of them of action that relates to a matter of administration mentioned in any of the following paragraphs:
(a) action taken by or for a public authority and action taken by or for a Commonwealth or State department or authority;
(b) action taken by or for an entity established or administered jointly by or for:
(i) the Territory and the Commonwealth; or
(ii) the Territory and 1 or more States; or
(iii) the Territory, the Commonwealth and 1 or more States;
(c) action taken by or for an entity mentioned in paragraph (b) and action taken by or for:
(i) a public authority; or
(ii) a Commonwealth or State department or authority.
(2) For subsection (1), action taken by an entity includes action taken by the entity for another entity.
(3) An arrangement made under subsection (1) may relate to particular actions, a series of related actions or classes of actions.
(4) This section does not affect the powers and functions of the Ombudsman under another provision of this Act.
(5) Subsection (1) does not empower:
(a) the Ombudsman to exercise a power or perform a function of the Ombudsman of the Commonwealth or a State except under an instrument of delegation given under a law of the Commonwealth or State; or
(b) the Ombudsman of the Commonwealth or a State to exercise a power or perform a function of the Ombudsman under this Act except under an instrument of delegation given under section 147.