(1) An event covered by subsection (2) is a post - charge event in relation to a person if it happens at a time when:
(a) the person has been charged with a relevant offence and that charge is still to be resolved; or
(b) such a charge is imminent.
(2) The events are as follows:
(a) a notice to produce is issued to the person;
(b) a summons is issued for the person to attend a hearing as a witness;
(c) a hearing commences at which the person is to appear as a witness;
(d) material at a hearing that relates to the person becomes investigation material;
(e) such investigation material or derivative material is used or disclosed.