14 CFR 223.11 : Aeronautics And Space (§ 1.1 To Parts 1311-1399) — (§ 200.1 To Parts 461-1199) — Office Of The Secretary, Department Of Transportation (Aviation Proceedings) (§ 200.1 To § 399.120) — Economic Regulations (§ 200.1 To § 298.80) — Free And Reduced-Rate Transportation (§ 223.1 To § 223.25) — Domestic Travel (§ 223.11) — Free and reduced-rate transportation permitted.