(1) A nominated Tribunal member may vary a formal authority on application under subsection 15GU(1).
(2) Subject to subsection (3), a variation may extend the period of effect of the authority .
(3) For the purposes of subsection (2), the period of the extension must not exceed the lesser of:
(a) 3 months; and
(b) a period that would result in the period of effect of the authority exceeding 24 months (including any previous extensions under this Subdivision or Subdivision B).
(4) A nominated Tribunal member may only vary a formal authority during the period of 2 weeks before the end of the period of effect of the authority.