(1)  This section and section 1 shall commence on the date of assent to this Act.

(2)  Except as provided in subsections (1) , (3) , and (4) , this Act shall commence on a date to be fixed by proclamation.

(3)  Sections 79 , 80 , and 81 shall commence on a date to be fixed by proclamation, being a day that is the same as, or that is subsequent to, the date fixed under subsection (2) .

(4)  Division 3 of Part VI ( sections 79 , 80 , and 81 excepted), Division 4 of that Part, and section 104 shall commence on 1st July 1980.