Contributed by StephenShaw and current to 27 July 2018
The following list of relevant sites is by no means exhaustive, but does give a series of jumping off points:
For Commonwealth and State laws and regulation as well as court decisions and other material try Austlii: http://www.austlii.edu.au/;
For up to date Western Australian Statutes and Regulations use the State Law Publisher: www.slp.wa.gov.au/index.htm;