The Australian Capital Territory (ACT) has gone further than any other Australian jurisdiction, decriminalizing limited adult possession and home cultivation rather than fully legalizing a commercial market. Since January 31, 2020, adults there can possess up to 50 grams of dried cannabis or 150 grams fresh, and cultivate two plants per person, capped at four plants per household. Sale and supply remain illegal in the ACT, so it’s a decriminalized-possession model, not a legal retail market.
South Australia uses expiation notices, on-the-spot fines for minor cannabis offenses that avoid a criminal conviction, keeping minor possession out of the court system while maintaining prohibition.
Victoria uses its Cannabis Cautioning Program to divert eligible small-quantity personal possession away from criminal charges, generally involving drug counselling, with no fixed cap on how many times a person can be cautioned under current police guidance.
Western Australia requires people caught with 10 grams or less to complete a Cannabis Intervention Requirement, including mandatory counselling.