14 CFR 250.9 : 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) — Oversales (§ 250.1 To § 250.11) — Written explanation of denied boarding compensation and boarding priorities, and verbal notification of denied boarding compensation.