Commonwealth Consolidated Acts Commonwealth Consolidated Acts(1) An authority may be varied by an appropriate authorising officer (whether on application or on the authorising officer's own initiative) only:
(a) in the case of a variation on the authorising officer's own initiative or on a formal variation application (other than a variation referred to in subparagraph (b)(ii))--by means of a written document, signed by the authorising officer (such a variation is a formal variation of authority ); or
(b) in the case of a variation on:
(i) an urgent variation application; or
(ii) the authorising officer's own initiative or a formal variation application, if the authorising officer is satisfied that the delay caused by granting a formal variation of authority may affect the success of the controlled operation;
orally in person, or by telephone or any other means of communication (such a variation is an urgent variation of authority ).
(2) The authorising officer must, as soon as practicable, prepare and give a written document that complies with section 15GS to the applicant or, if the variation was on the initiative of the authorising officer, to the principal law enforcement officer for the controlled operation.