(1) A person is the relevant chief executive for the purposes of exercising powers under this Part in relation to evidential material, if an Act provides that the person is the relevant chief executive in relation to the evidential material for the purposes of this Part.
(2) A person who is the relevant chief executive for the purpose of exercising powers mentioned in subsection (1) is also the relevant chief executive 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 the relevant chief executive in relation to evidential material for the purposes of this Part by:
(a) providing that a person who holds a specified office is the relevant chief executive in relation to the evidential material for those purposes; or
(b) authorising another person to specify that a person, or a person who holds a specified office, is the relevant chief executive in relation to the evidential material for those purposes.