(1) The Secretary, by instrument in writing, may appoint a person as an assistant fisheries officer for the period, not exceeding 3 years, specified in the instrument.(2) An appointment as assistant fisheries officer may be for the whole or a part of the State.(3) The Secretary is to issue to an assistant fisheries officer (a) a copy of the instrument of appointment; and(b) an identity card in an approved form which (i) certifies the appointment as an assistant fisheries officer for the purpose of this Act; and(ii) specifies the period of the appointment; and(iii) specifies the part of the State to which the appointment relates; and(iv) contains a recent photograph of the assistant fisheries officer.(4) A person ceases to be an assistant fisheries officer (a) if the Secretary revokes the appointment of that person, on the date of that revocation; or(b) if the person resigns, on the date of the resignation.