5(1)The Commissioner may not vary a notice of intent except as set out in sub-paragraph (2).
(2)The Commissioner may vary a notice of intent by extending the period mentioned in paragraph 4(4)(f) or (g).
(3)Sub-paragraph (1) does not prevent the Commissioner from serving a new notice of intent instead of varying such a notice.
(4)The Commissioner may cancel a notice of intent.
(5)A variation or cancellation of a notice of intent is effected by serving on the person on whom the notice was served a notice setting out the variation or cancellation.