Short answer
You cannot carry cannabis across a state line. Federal law bans it. A state medical card does not change that. Two legal states do not create a legal corridor between them.
cannabis and state lines legal advice
Federal jurisdiction starts when the plant, the product or the package crosses a state border. Local legalization stops at the same border.
Cannabis and State Lines: A Review With a Clear First Pick
Federal law
Cannabis is a Schedule I substance under the Controlled Substances Act, 21 U.S.C. § 812. Schedule I means no accepted medical use and high abuse potential in the federal schedule.
21 U.S.C. § 841(a)(1) makes it a crime to manufacture, distribute or dispense a Schedule I substance, and to possess it with intent to do so. Moving cannabis from one state to another is transport and, in most charging decisions, distribution.
cannabis and state lines legal advice
Gonzales v. Raich, 545 U.S. 1 (2005), settled the Commerce Clause question. The Supreme Court ruled Congress can regulate cannabis grown at home for personal medical use because that plant competes with the illegal interstate market.
Penalties. Simple possession, 21 U.S.C. § 844, carries up to one year in prison and a minimum fine of $1,000 for a first offense. Less than 50 kilograms of cannabis mixture, 21 U.S.C. § 841(b)(1)(D), carries up to five years and a $250,000 fine for an individual. Higher weights carry longer terms.
State law stops at the state line
No state authorizes the import of cannabis from another state. Legal markets are closed loops. Cultivation, testing and retail happen inside the state, and product is tracked from seed to sale.
A driver who starts in a legal state and passes through a prohibition state faces that state's possession law. Prosecutors there file under state statutes and the case stays in state court.
Points where cannabis gets found
- Traffic stops. A smell report or a visible container gives an officer probable cause. Vehicle seizure and civil forfeiture can follow.
- Airports. TSA states its officers do not search for cannabis. When screening finds it, TSA refers the matter to local law enforcement. Federal airspace and federal property remain federal jurisdiction.
- Border Patrol checkpoints. Interior checkpoints exist within 100 miles of a land border or the coast. Agents can seize cannabis and make an arrest.
- Mail and parcel. Mailing cannabis violates federal law and Postal Service rules. Private carriers also screen shipments.
Hemp is a separate category
The 2018 Farm Bill, 7 U.S.C. § 1639o, removed hemp from the Controlled Substances Act. Hemp is cannabis with delta-9 THC at or below 0.3 percent on a dry weight basis. Hemp may cross state lines under federal law.
States can still restrict hemp and hemp-derived intoxicants. Several states ban or limit delta-8 THC and similar products. A shipment that is legal at the federal level can be stopped under a state statute.
Medical patients
Congress limits federal spending against state medical cannabis programs through an appropriations rider, first passed as the Rohrabacher amendment. The rider does not authorize transport across a state line. Courts have read it as protecting conduct that follows state law, not interstate movement.
Some states honor out-of-state medical cards for purchases inside that state. That is a purchase rule, not a travel rule.
What to do
- Buy cannabis in the state where you plan to consume it. Consume it there. Leave the rest.
- Do not place product in a checked bag, a carry-on or a vehicle for a trip that crosses a border.
- Check the destination state's rules before travel. States differ on possession limits, concentrates and hemp products.
- If a charge is filed, retain an attorney licensed in the state where the charge is filed. Federal charges go to U.S. District Court and call for a federal criminal defense attorney.
- Do not discuss the case with law enforcement without counsel.
Unknowns and limits
Federal enforcement levels change with each administration. State laws change each session. This page gives general information, not legal advice for a specific case.