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Code · CFR · Title 14 — Aeronautics and Space · Part 252 — Smoking Aboard Aircraft · § 252.9

§ 252.9. Ventilation systems.

46 words·~1 min read·/us/cfr/t14/s§ 252.9·

A research copy — for the controlling text, always check the official state or federal source. Not legal advice.

Air carriers shall prohibit smoking whenever the ventilation system is not fully functioning. Fully functioning for this purpose means operating so as to provide the level and quality of ventilation specified and designed by the manufacturer for the number of persons currently in the passenger compartment.
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