Practice question

Under the Misuse of Drugs Act 1971 and Road Traffic Act 1988, what is the legal limit for delta-9-tetrahydrocannabinol (THC, cannabis) in blood for a driver?

  1. 2 µg/L
  2. 5 µg/L
  3. 10 µg/L
  4. Zero tolerance only

Answer: A — 2 µg/L

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Practice more: Driver CPC Theory Test (Part 1a) →