(1) A person is an authorised person for the purposes of exercising powers under this Part in relation to evidential material if an Act provides that the person is an authorised person in relation to the evidential material for the purposes of this Part.
(2) A person who is an authorised person for the purpose of exercising powers mentioned in subsection (1) is also an authorised person for the purposes of:
(a) exercising other powers under this Part; or
(b) performing functions or duties under this Part;
that are incidental to the powers mentioned in subsection (1).
(3) Without limiting subsection (1), an Act may provide that a person is an authorised person in relation to evidential material for the purposes of this Part by:
(a) providing that a person of a specified class is an authorised person in relation to the evidential material for those purposes; or
(b) authorising another person to specify that a person, or a person of a specified class, is an authorised person in relation to the evidential material for those purposes.