Have a look for the antidiscrimination laws on breastfeeding.. From memory they have to give you time (not necessarily paid) and a location to pump, which is not a bathroom. They are also obliged to prove you with a way to store pumped milk (fridge).. I only read it a few months ago.. but im sure you can find it easy.. Maybe even the Australian Breastfeeding Association might be able to point you in the right direction? You could try emailing them..

otherwise, good luck

K