Drug trafficking under the Criminal Code Act 1995 (Cth) includes selling a controlled drug, preparing or transporting it for sale, concealing it with intent to sell, or possessing it with the intention of sale. Even small-scale importation or trafficking can trigger federal charges.

State offences under the Controlled Substances Act 1984 (SA) usually deal with local possession, cultivation or supply. Commonwealth offences apply where drugs are imported, exported, trafficked across borders, or involve international syndicates. They carry far heavier penalties and are prosecuted by the Commonwealth DPP.

The Criminal Code Regulations list thresholds for each drug. For example, 2 grams of heroin or methamphetamine is a marketable quantity, while 1.5 kg of heroin or 750 g of methamphetamine is a commercial quantity.

Courts treat offences more seriously if:

• The drugs were imported from overseas.
• The accused was part of an organised syndicate.
• Firearms, violence, or intimidation were involved.
• The drugs were distributed near schools or vulnerable communities.
• The accused had a leadership role or prior convictions.

Small cannabis grows are usually prosecuted under South Australian law. Cultivation becomes a Commonwealth offence when the plants or product are trafficked for sale, tied to importation/exportation, or involve commercial quantities listed in the Criminal Code Regulations.

Pre-trafficking involves selling, manufacturing, or possessing a precursor chemical with the intention that it be used to make drugs. While rarely prosecuted, it is an offence under the Commonwealth Criminal Code and can attract penalties of up to 25 years for commercial quantities.

Bail is possible but difficult to secure. Courts will weigh the seriousness of the offence, the risk of flight, and whether the accused has ties to organised crime or international syndicates.

Investigations are usually conducted by the Australian Federal Police (AFP), often in cooperation with Australian Border Force (ABF) and state police. Techniques include controlled deliveries, surveillance, phone intercepts, and international intelligence sharing.

Possible defences include:

• No knowledge of the drug’s presence or intended sale.
• No intention to traffic (personal use only).
• Duress or coercion.
• Honest and reasonable mistake (rare).
• Procedural issues such as unlawful search or improper chain of custody.

Commonwealth trafficking sentences are generally much longer because of the cross-border element and the national impact. For example, importing or trafficking a commercial quantity under federal law can lead to 15-25 years or life imprisonment, whereas state trafficking sentences are typically lower for similar amounts.

Because importation and trafficking offences often involve many players, prosecutors frequently rely on conspiracy, joint commission, and accessorial liability to prove involvement. This allows people who weren’t physically handling the drugs — but organised, financed, or assisted to be convicted alongside those who carried the drugs.

Yes. Drug offences may be prosecuted under Commonwealth law (Criminal Code Act 1995 (Cth)) or South Australian law, depending on the nature and scope of the offence. Importation and cross-border cases usually fall under federal jurisdiction.