14 CFR Part 252

9 sections.

§ 252.1
§ 252.1 Purpose.
§ 252.2
§ 252.2 Applicability.
§ 252.3
§ 252.3 Definitions.
§ 252.4
§ 252.4 Smoking ban: air carriers.
§ 252.5
§ 252.5 Smoking ban: foreign air carriers.
§ 252.8
§ 252.8 Extent of smoking restrictions.
§ 252.9
§ 252.9 Ventilation systems.
§ 252.11
§ 252.11 Aircraft on the ground.
§ 252.17
§ 252.17 Enforcement.

This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.