(1) If a past act is an act attributable to the Commonwealth, the act is valid, and is taken always to have been valid.
Effect of validation of law
(2) To avoid any doubt, if a past act validated by subsection (1) is the making, amendment or repeal of legislation, subsection (1) does not validate:
(a) the grant or issue of any lease, licence, permit or authority; or
(b) the creation of any interest in relation to land or waters;
under any legislation concerned, unless the grant, issue or creation is itself a past act attributable to the Commonwealth.