(note this section is still being updated)
There are no National laws in Australia relating to Animal welfare. The state and territory laws regulating companion animals are contained in the following acts. The relevant government departments responsible for administering the legislation are listed under the State or Territory legislation.
New South Wales
http://www.legislation.nsw.gov.au/viewtop/inforce/act+200+1979+FIRST+0+N/
http://www.legislation.nsw.gov.au/viewtop/inforce/subordleg+523+2006+FIRST+0+N/
http://www.dpi.nsw.gov.au/agriculture/livestock/animal-welfare/general#Legislation
Victoria
http://corrigan.austlii.edu.au/au/legis/vic/consol_act/poctaa1986360/
Australian Capital Territory
Queensland
Tasmania
http://www.austlii.edu.au/au/legis/tas/consol_act/awa1993128/
Western Australia
Australian Capital Territory
http://www.austlii.edu.au/au/legis/act/consol_act/awa1992128/
Northern Territory
New legislation relating to welfare and control of cats.
The Western Australian parliament’s Legislative Council delivered the second reading speech of the Cat Bill 2011.