14 C.F.R. § 252.11 Aircraft on the ground.
Title 14 - Aeronautics and Space
(a) Air carriers shall prohibit smoking whenever the aircraft is on the ground. (b) With respect to the restrictions on smoking described in §252.5, foreign air carriers shall prohibit smoking from the time an aircraft begins enplaning passengers until the time passengers complete deplaning.
Title 14: Aeronautics and Space
PART 252—SMOKING ABOARD AIRCRAFT
§ 252.11 Aircraft on the ground.
