While a few carriers have already implemented 2 factor authentication the government has decided to regulate porting even further. Changes will include identification checks and a new system that would check ownership of a number. Things like name and address on losing carriers account system would need to match, also the ID being provided to the new carrier would have to be exact on losing carriers system.
For now they are intending to make 2FA a requirement for every carrier in Australia, not just the bigger ones who have self imposed this system.
Personally given how it's essentially easier to port a postpaid number (all you need is the account #) than prepaid (DOB"s have to match) I think any change which protects the consumer is a good thing.
More info in this article
Account number is easier than DOB?