If:
(a) a person or a court does an act in the purported exercise of a power, or the purported performance of a function, under a law of a State or Territory; and
(b) the act could have been done by the person or court in the exercise of a power, or the performance of a function, under the applied provisions;
the act is taken to have been done in the exercise of the power, or performance of the function, under the applied provisions.
Note: Applied provisions is defined by section 7.