I am Australian but live in the US now. Chams are prohibited and illegal in Australia. There are some cham owners in Australia but they fly under the radar.
I wont divulge those I know of as I don't know you or if you would be a responsible keeper and not release it at any point into nature. I take a strong view that they should not be there at all. Also chams are wonderful escape artists and there are many stories here of responsible keepers loosing a cham. We have had too many invasive species released and done irreparable damage.
Also if your cham needed a vet anytime then what do you do? It would be very hard to take a banned species for medical treatment which means the cham would suffer.
If you live in Australia then stick to all the cool critters that we have there