14 CFR § 258.3 - Definitions.

---
identifier: "/us/cfr/t14/s258.3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 258.3 - Definitions."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "258.3"
section_name: "Definitions."
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"
---


# 258.3 Definitions.

As used in this part:

(a) *Air transportation* has the meaning ascribed to it in 49 U.S.C. 40102(5).

(b) *Carrier* means any air carrier or foreign air carrier as defined in 49 U.S.C. 40102(2) or 49 U.S.C. 40102(21), respectively, that engages directly in scheduled passenger air transportation.

(c) *Change-of-gauge service* means a service that requires a change of aircraft en route but has only a single flight number.

(d) *Ticket agent* has the meaning ascribed to it in 49 U.S.C. 40102(a)(45).

[64 FR 12860, Mar. 15, 1999, as amended by Doc. No. DOT-OST-2014-0140, 84 FR 15933, Apr. 16, 2019]