Maximum fine for a breach of the Environment Protection and Biodiversity Conservation Act is $110,000 and 5 years in jail. You might also have broken other Federal and State laws. Due to the Reverse Onus of Proof, in court you will need to prove you didn't smuggle the exotics in.
If the exotics were smuggled in, AQIS will not only seize the exotics, but also any native reptiles you have too, legally held or otherwise.
That conference was held by Medical doctors who were discussing snakebites and envenomations. The concern was that hospuitals are not setup to treat people who have been bitten by their pet Mamba, and were discussing ways to at least be aware of what exotic vens were held in their areas.
Hix