(1) The CEO may, at any time, by notice in writing given to the licence holder, amend a licence.
(2) Without limiting subsection (1), the CEO may:
(a) impose additional licence conditions; or
(b) remove or vary licence conditions that were imposed by the CEO; or
(c) extend or reduce the authority granted by the licence; or
(d) if the licence was issued for a specified period--extend that period.
(3) If the conditions are specific to particular material, or to particular apparatus, the notice under subsection (1) must be given to the licence holder who, according to the CEO's records, has possession or control of the material or apparatus at the time the condition is imposed, removed or varied.