14 CFR § 257.4 - Unfair and deceptive practice.

---
identifier: "/us/cfr/t14/s257.4"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 257.4 - Unfair and deceptive practice."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "257.4"
section_name: "Unfair and deceptive practice."
chapter_name: "OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS)"
subchapter_number: "A"
subchapter_name: "ECONOMIC REGULATIONS"
part_number: "257"
part_name: "DISCLOSURE OF CODE-SHARING ARRANGEMENTS AND LONG-TERM WET LEASES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 40113(a) and 41712."
regulatory_source: "64 FR 12851, Mar. 15, 1999, unless otherwise noted."
cfr_part: "257"
---


# 257.4 Unfair and deceptive practice.

The holding out or sale of scheduled passenger air transportation involving a code-sharing arrangement or long-term wet lease is prohibited as unfair and deceptive in violation of 49 U.S.C. 41712 unless, in conjunction with such holding out or sale, carriers and ticket agents follow the requirements of this part.