44Variation or cancellation of authority

44 Variation or cancellation of authority (1) The chief officer of a law enforcement agency who grants an (a) may vary or cancel the authority at any time; and (b) must cancel the authority if the chief officer is satisfied (on a review under section 45 or otherwise) that use of the assumed identity is no longer necessary. (2) The chief officer must give written notice of the variation or cancellation to: (a) the authorised person to whom it relates; and (b) if the authorised person is an authorised civilian – the authorised civilian's supervisor. (3) The notice must state why the authority is varied or cancelled. (4) The variation or cancellation takes effect at the time the written notice is given to the authorised person or, if a later time is specified, that later time.