(1) The Secretary, by instrument in writing, may appoint a person as a fisheries officer for the period, not exceeding 3 years, specified in the instrument.(2) The Secretary may appoint a person who is a fisheries officer, fisheries inspector or similar officer in another State or a Territory of the Commonwealth under any law relating to fisheries in that State or Territory as a fisheries officer for the purpose of this Act.(3) The Secretary is to issue to a fisheries officer an identity card in an approved form which (a) certifies the appointment as a fisheries officer for the purpose of this Act; and(b) specifies the period of the appointment; and(c) contains a recent photograph of the fisheries officer.(4) . . . . . . . .