Originally Posted by LHR/MEL/Europe FF

I think what the OP is saying is that Aussie rules don't allow the use of tamper proof bags at connecting airports for purchased duty free (that is, even if it is in a tamper proof bag, the OP won't be able to carry it on board at the last connecting point (Singapore)).

AFAIK, this hasn't changed and the OP is correct. Some airports have special provisions now to deliver DF purchased at the last connecting point (like SIN), but this doesn't include bringing tamper proof bags from earlier purchases.

Originally Posted by CPMaverick

I don't understand. Why do you want to involve STEBs (tamper-resistant bags)?

Australia has limits on what you can bring in duty-free. As long as you meet that criteria, you are fine.

STEBs are to assist in security checks. They don't have anything to do with immigration. I don't know of any country that changes their duty-free allowance based on STEBs.

Forget the STEBs, can you elaborate on what you want to actually accomplish? We can probably help.