The_Cricket_Nerd nah we're not, my friends nearly got suspended
Under the Education and Training Reform Act 2006 (Vic), Victorian school principals are empowered to regulate activity on school grounds.
They may declare and ban items from being brought into school premises if the principal reasonably believes those items may be used in a threatening, violent, or harmful manner—such a declaration provides the legal basis for subsequent search and seizure.
Department of Education Victoria
Victoria Education
Furthermore, principals and authorised teachers have the authority to search for and seize such items when they suspect they are harmful—regardless of whether a formal declaration was made.
Department of Education Victoria
Victoria Education
Even though the legislation specifically addresses "harmful items," this provision broadly grants principals discretion to manage and prohibit any unauthorized on‑site activity—including unsanctioned selling—to maintain safety and order. It stems from the same legal authority that allows principals to restrict access and items on school property.