I spoke to Brian who runs a cattle stud to get an idea about the legal requirements he must observe in order to run his agricultural enterprise. Brian began on the topic of restraining the farm's animals and the importance of good fencing and gates. There is an interesting article here also discussing the matter.
He also spoke of the requirements to control noxious weeds and responsibly stop their spread. This involves a duty to ensure contractors and their vehicles do not come on to the property and spread weeds. More info on the legislation regarding weeds is here. http://www.environment.gov.au/biodiversity/invasive/weeds/government/legislation.html
We discussed the need to report pest and disease outbreaks such as foot and mouth. For more info on reportable diseases look here.
In particular respect to Brian's cattle stud he discussed the requirements related to identification and tagging of cattle. Meat and Livestock Australia has good info on their website.
To finish we discussed the obligations set down by the RSPCA for animal welfare and it's implementation on farms. More info here.