The Department of Transportation is issuing a final rule to extend the smoking ban in 14 CFR Part 252 to include all charter (i.e., nonscheduled) flights where a flight attendant is a required crewmember. The revised Part 252 would comport with 49 U.S.C. § 41706, which was revised in 2012, to ban smoking on charter flights where a flight attendant is a required crewmember. This final rule also explicitly bans the use of electronic cigarettes (“e-cigarettes”) on all flights where smoking is banned. The Department interprets the existing Part 252 to prohibit e-cigarette use, but is codifying this interpretation.