A certificate purporting to be signed by the chief executive stating any of the following matters is evidence of the matter—
(a) a stated document is one of the following things made, given, or issued under this Act—(i) an appointment;(ii) a decision;
(b) a stated document is a copy of a thing mentioned in paragraph (a) ;
(c) on a stated day, or during a stated period, a person’s appointment as an authorised officer was, or was not, in force;
(d) on a stated day, a stated requirement was made of a stated person;
(e) that on a stated day, or during a stated period, a stated notice was published on the department’s website.