3   Definitions

(1)  In this Act:

instrument means an instrument (including a statutory rule or an environmental planning instrument) made under an Act, and includes an instrument made under any such instrument.

(2)  In this Act:

(a)  a reference to a function includes a reference to a power, authority and duty, and

(b)  a reference to the exercise of a function includes, in relation to a duty, a reference to the performance of the duty.