# 14 C.F.R. § 1.3 (2026): Rules of construction

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T14_P1_S1_3

## Section

- **Citation:** 14 C.F.R. § 1.3 (2026)
- **Heading:** Rules of construction
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Title 14 CFR: Aeronautics and Space / Chapter I: FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION / Part 1: DEFINITIONS AND ABBREVIATIONS / § 1.3: § 1.3   Rules of construction.

## Text

(a) In this chapter, unless the context requires otherwise:
(1) Words importing the singular include the plural;
(2) Words importing the plural include the singular; and
(3) Words importing the masculine gender include the feminine.
(b) In this chapter, the word:
(1)
Shall
is used in an imperative sense;
(2)
May
is used in a permissive sense to state authority or permission to do the act prescribed, and the words “no person may * * *” or “a person may not * * *” mean that no person is required, authorized, or permitted to do the act prescribed; and
(3)
Includes
means “includes but is not limited to”.
[Doc. No. 1150, 27 FR 4590, May 15, 1962, as amended by Amdt. 1-10, 31 FR 5055, Mar. 29, 1966; FAA-2023-1275, Amdt. No. 1-78, 89 FR 92483, Nov. 21, 2024]

## Nearby sections

- [14 C.F.R. § 1.1 (2026) § 1.1   General definitions.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P1_S1_1.md)
- [14 C.F.R. § 1.2 (2026) § 1.2   Abbreviations and symbols.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P1_S1_2.md)
- [14 C.F.R. § 1.3 (2026) § 1.3   Rules of construction.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P1_S1_3.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T14_P1_S1_3. Check the current official text before relying on it. Not legal advice.