Section 48 of the Migration Act 1958 prevents a non-citizen who is in Australia without a substantive visa from making further visa applications onshore after their last visa was refused or cancelled. Once triggered, the bar blocks all visa applications from within Australia except for the prescribed classes listed in regulation 2.12 of the Migration Regulations 1994. The bar continues until the person either departs Australia, obtains a substantive visa through one of the prescribed exceptions, or the underlying decision that triggered it is successfully overturned. It does not expire with the passage of time.

