(1) If, in respect of a fishery, there is in force an arrangement under this Division under which a Joint Authority has the management of the fishery and the fishery is to be managed in accordance with the law of the Commonwealth:
(a) AFMA has the same powers in relation to the fishery as it would have if the fishery were under the management of AFMA; and
(b) references in sections 18 and 20 to the Minister are taken, in relation to the fishery, to be references to the Joint Authority.
(2) If:
(a) an arrangement is in force under this Division under which a Joint Authority has the management of a fishery; and
(b) a part of the fishery is to be managed in accordance with the law of the Commonwealth;
then:
(c) AFMA has the same powers in relation to the part of the fishery as it would have if the part of the fishery were under the management of AFMA; and
(d) references in sections 18 and 20 to the Minister are taken, in relation to the part of the fishery, to be references to the Joint Authority.