14 CFR § 258.4 - Unfair and deceptive practice.

---
identifier: "/us/cfr/t14/s258.4"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 258.4 - Unfair and deceptive practice."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "258.4"
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: "258"
part_name: "DISCLOSURE OF CHANGE-OF-GAUGE SERVICES"
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 12860, Mar. 15, 1999, unless otherwise noted."
cfr_part: "258"
---


# 258.4 Unfair and deceptive practice.

The holding out or sale of scheduled passenger air transportation that involves change-of-gauge service is prohibited as an unfair or deceptive practice or an unfair method of competition within the meaning 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.