A person may acquire or use an assumed identity if:
(a) the person is an authorised person (other than an authorised civilian) and the acquisition or use is:
(i) in accordance with an authority; and
(ii) in the course of duty; or
(b) the person is an authorised civilian and the acquisition or use is in accordance with:
(i) an authority; and
(ii) any direction by the person's supervisor under the authority.