14 CFR § 3.401 - Applicability and definitions.
---
identifier: "/us/cfr/t14/s3.401"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 3.401 - Applicability and definitions."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "3.401"
section_name: "Applicability and definitions."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "A"
subchapter_name: "DEFINITIONS AND GENERAL REQUIREMENTS"
part_number: "3"
part_name: "GENERAL REQUIREMENTS"
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. 106(f), 40113, 44701-44709, 46111, 46103 and 46301."
regulatory_source: "FAA-2003-15062, Amdt. 3-1, 70 FR 54832, Sept. 16, 2005, unless otherwise noted."
cfr_part: "3"
---
# 3.401 Applicability and definitions.
(a) This subpart applies to any person subject to the requirements in subchapter A (except parts 1 and 3), subchapter C (except part 39), subchapter D, subchapter E (except parts 71 and 73), subchapter F (except parts 95 and 97), subchapter G (except part 110), subchapter H, and subchapter K (except parts 185, 187, 189, and 193), of this chapter.
(b) For purposes of this part, “document in any format” includes documents (electronic or physical), and also other tangible items, such as data plates or marked parts.