(1) The consent of a person to be a group member in a representative proceeding is not required unless subsection (2) applies to the person.
(2) None of the following persons is a group member in a representative proceeding unless the person gives written consent to being so:
(a) the Commonwealth, a State or a Territory;
(b) a Minister or a Minister of a State or Territory;
(c) a body corporate established for a public purpose by a law of the Commonwealth, of a State or of a Territory, other than an incorporated company or association; or
(d) an officer of the Commonwealth, of a State or of a Territory, in his or her capacity as such an officer.