49 USC § 321 - Definitions

---
identifier: "/us/usc/t49/s321"
source: "usc"
legal_status: "official_legal_evidence"
title: "49 USC § 321 - Definitions"
title_number: 49
title_name: "TRANSPORTATION"
section_number: "321"
section_name: "Definitions"
chapter_number: 3
chapter_name: "GENERAL DUTIES AND POWERS"
subchapter_number: "II"
subchapter_name: "ADMINISTRATIVE"
positive_law: true
currency: "119-84"
last_updated: "2026-04-17"
format_version: "1.1.0"
generator: "[email protected]"
source_credit: "(Pub. L. 97–449, § 1(b), Jan. 12, 1983, 96 Stat. 2422; Pub. L. 98–216, § 2(2), Feb. 14, 1984, 98 Stat. 5; Pub. L. 103–272, § 5(m)(8), July 5, 1994, 108 Stat. 1376; Pub. L. 103–429, § 6(2), Oct. 31, 1994, 108 Stat. 4378.)"
---


# § 321. Definitions

section 40102(a) of this title

In this subchapter, “aeronautics”, “air commerce”, and “air navigation facility” have the same meanings given those terms in .

---

**Source Credit**: (Pub. L. 97–449, § 1(b), Jan. 12, 1983, 96 Stat. 2422; Pub. L. 98–216, § 2(2), Feb. 14, 1984, 98 Stat. 5; Pub. L. 103–272, § 5(m)(8), July 5, 1994, 108 Stat. 1376; Pub. L. 103–429, § 6(2), Oct. 31, 1994, 108 Stat. 4378.)

| RevisedSection | Source (U.S. Code) | Source (Statutes at Large) |
| --- | --- | --- |
| 321 | (no source). |  |

A number of the source provisions of the subchapter are taken from 49:ch. 20. The text of 49:ch. 20 contains general definitions, some of which are used in those source provisions. The section includes those definitions from 49:ch. 20 that are used in the source provisions included in the subchapter.

### Pub. L. 103–429

This makes a clarifying amendment to 49:321.

## Editorial Notes

### Amendments

1994— struck out “, respectively” after “of this title”.

substituted “” for “section 101(2), (4), and (8) of the Federal Aviation Act of 1958 (49 App. U.S.C. 1301(2), (4), (8))”.

1984— substituted “49 App. U.S.C.” for “49 U.S.C.”.

## Statutory Notes and Related Subsidiaries

### Effective Date of 1994 Amendment

> “The amendments made by sections 6(2)–(15), (19)–(35), (37)–(39), (41), (44)–(52), (54)–(62), (65), (66)(B), (70), (73)–(76), and (78)–(81) of this Act [enacting
> 
> and amending this section and sections 5103, 5104, 5115, 5125, 5307, 5318, 5320, 5323, 5326, 5327, 5331, 5337, 5565, 20136, 22108, 24501, 24904, 30141, 30165, 30166, 30308, 31501, 32101, 32304, 32309, 32505, 32703, 32705, 32706, 32908 to 32910, 32913, 33101, 33106, 40102, 40104, 40110, 41103, 41110, 41734, 44502, 44701, 44711, 44937, 45105, 45302, 46301, 46310, 46502, 47101, 47113, 47114, 47128, 47531, 47532, 60109, and 60112 of this title] shall take effect on
> 
> .”

, , , provided that: