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The Pilots Desk
US-FAA14 CFR 91.19

Carriage of narcotic drugs, marihuana, and depressant or stimulant drugs or substances

Read the official rule

This regulation prohibits operating a civil aircraft in the United States if you know it's carrying illegal drugs—specifically narcotic drugs, marijuana, or depressant or stimulant drugs or substances as defined by federal or state law.

The key word is "knowledge." You cannot knowingly allow your aircraft to be used for drug transportation. This makes pilots potentially liable if they're aware their aircraft is carrying illegal substances.

However, there's an important exception: the rule doesn't apply when the drugs are being carried legally under federal or state law or with authorization from a federal or state agency. This means legitimate transport is permitted, such as:

  • Medical supplies or pharmaceuticals being transported legally
  • Law enforcement operations
  • Properly authorized medical marijuana in states where legal (with proper authorization)

The regulation essentially says you cannot knowingly participate in illegal drug transportation using your aircraft, but legal, authorized carriage is acceptable.

*This is a plain-English summary for study only. The official 14 CFR text on this page is controlling — always read the current regulation and consult a CFI.*

This is an original plain-English explanation for training and reference, not legal advice and not for navigation. Always rely on the current official rule linked above. Last reviewed June 20, 2026.