Sure.
S.75 of the Drug, Poisons and Controlled Substances Act 1981 prohibits the use of a drug of dependence as defined in that Act.
http://www.austlii.edu.au/au/legis/vic/consol_act/dpacsa1981422/s75.html
Drugs of dependence are defined as those listed thus in Schedule 11.
http://www.austlii.edu.au/au/legis/vic/consol_act/dpacsa1981422/s4.html
Schedule 11 lists Cocaine in Column 1 of Part 3.
http://www.austlii.edu.au/au/legis/vic/consol_act/dpacsa1981422/sch11.html
Happy?
Yes I am happy, carry on boss.