(1) An action that, under these regulations would constitute an offence, does not constitute the offence if the action:
(a) is commenced before these Regulations commence; and
(b) is one that in all other respects is a lawful action.
(2) Subregulation (1) does not apply to an action if, after these Regulations commence:
(a) the character, or the environmental consequence, of the action significantly changes and no authorisation is obtained under these Regulations in relation to the change; or
(b) the action continues for a period longer than 6 months.