Skip to content

Title 18 — Crimes and Criminal Procedure

Part I · Chapter 2 — Aircraft and Motor Vehicles

§ 31. Definitions

Statutory text

(a)

Definitions.—

In this chapter, the following definitions apply:

(1)

Aircraft.—

The term “aircraft” means a civil, military, or public contrivance invented, used, or designed to navigate, fly, or travel in the air.

(2)

Aviation quality.—

The term “aviation quality”, with respect to a part of an aircraft or space vehicle, means the quality of having been manufactured, constructed, produced, maintained, repaired, overhauled, rebuilt, reconditioned, or restored in conformity with applicable standards specified by law (including applicable regulations).

(3)

Destructive substance.—

The term “destructive substance” means an explosive substance, flammable material, infernal machine, or other chemical, mechanical, or radioactive device or matter of a combustible, contaminative, corrosive, or explosive nature.

(4)

In flight.—

The term “in flight” means—

(A)

any time from the moment at which all the external doors of an aircraft are closed following embarkation until the moment when any such door is opened for disembarkation; and

(B)

in the case of a forced landing, until competent authorities take over the responsibility for the aircraft and the persons and property on board.

(5)

In service.—

The term “in service” means—

(A)

any time from the beginning of preflight preparation of an aircraft by ground personnel or by the crew for a specific flight until 24 hours after any landing; and

(B)

in any event includes the entire period during which the aircraft is in flight.

(6)

Motor vehicle.—

The term “motor vehicle” means every description of carriage or other contrivance propelled or drawn by mechanical power and used for commercial purposes on the highways in the transportation of passengers, passengers and property, or property or cargo.

(7)

Part.—

The term “part” means a frame, assembly, component, appliance, engine, propeller, material, part, spare part, piece, section, or related integral or auxiliary equipment.

(8)

Space vehicle.—

The term “space vehicle” means a man-made device, either manned or unmanned, designed for operation beyond the Earth’s atmosphere.

(9)

State.—

The term “State” means a State of the United States, the District of Columbia, and any commonwealth, territory, or possession of the United States.

(10)

Used for commercial purposes.—

The term “used for commercial purposes” means the carriage of persons or property for any fare, fee, rate, charge or other consideration, or directly or indirectly in connection with any business, or other undertaking intended for profit.

(b)

Terms Defined in Other Law.—

In this chapter, the terms “aircraft engine”, “air navigation facility”, “appliance”, “civil aircraft”, “foreign air commerce”, “interstate air commerce”, “landing area”, “overseas air commerce”, “propeller”, “spare part”, and “special aircraft jurisdiction of the United States” have the meanings given those terms in sections 40102(a) and 46501 of title 49.

Legislative history

Reconstructed from this section’s Code source credit and amendment notes, resolved against the local Statutes at Large. Editorial notes are evidence, not the law that made the change.

  1. Pub. L. 84–595 § 1 · 70 Stat. 292

    Enacted · 18 U.S.C. § 31

    Added July 14, 1956, ch. 595, § 1, 70 Stat. 538

    Source evidence

    Code source credit
    Added July 14, 1956, ch. 595, § 1, 70 Stat. 538

  2. Aircraft Sabotage Act

    Pub. L. 98–473 § 2013(a)(1) · 98 Stat. 1837

    1. Struck · 18 U.S.C. § 31

      Pub. L. 98–473, § 2013(a)(1), in first par. struck out “and” before “spare part”

    2. Inserted · 18 U.S.C. § 31

      Pub. L. 98–473, § 2013(a)(1), in first par. inserted “and ‘special aircraft jurisdiction of the United States’ ”

    3. Substituted · 18 U.S.C. § 31

      Pub. L. 98–473, § 2013(a)(1), in first par. substituted “Federal Aviation Act of 1958” for “Civil Aeronautics Act of 1938”

    Source evidence

    Code amendment note
    Pub. L. 98–473, § 2013(a)(1), in first par. struck out “and” before “spare part”, inserted “and ‘special aircraft jurisdiction of the United States’ ”, and substituted “Federal Aviation Act of 1958” for “Civil Aeronautics Act of 1938”.

    Enacted provision · exact public law section
    (1) in the first paragraph by— (A) striking out “and” before the term “spare part” and inserting “and ‘special aircraft jurisdiction of the United States’ ” after the term “spare part”; and (B) striking out “Civil Aeronautics Act of 1938” and inserting in lieu thereof “Federal Aviation Act of 1958”;

  3. Comprehensive Crime Control Act of 1984

    Pub. L. 98–473 § 1010 · 98 Stat. 1837

    Substituted · 18 U.S.C. § 31

    Pub. L. 98–473, § 1010, substituted “passengers and property, or property or cargo” for “or passengers and property” in definition of motor vehicle

    Target inherited from the preceding amendment note.

    Source evidence

    Code amendment note
    Pub. L. 98–473, § 1010, substituted “passengers and property, or property or cargo” for “or passengers and property” in definition of motor vehicle.

    Enacted provision · exact public law section
    Sec. 1010. Section 31 of title 18 of the United States Code is Post, p. 2187. amended in the definition of “motor vehicle” by striking out “or passengers and property;” and inserting in lieu thereof “passengers and property, or property or cargo;”.

  4. Aircraft Sabotage Act

    Pub. L. 98–473 § 2013(a)(2) · 98 Stat. 1837

    Inserted · 18 U.S.C. § 31

    Pub. L. 98–473, § 2013(a)(2)–(4), inserted definitions of “in flight” and “in service”

    Target inherited from the preceding amendment note.

    Source evidence

    Code amendment note
    Pub. L. 98–473, § 2013(a)(2)–(4), inserted definitions of “in flight” and “in service”.

    Enacted provision · exact public law section
    (2) by striking out “and” at the end of the third undesignated paragraph thereof;

  5. Minor and Technical Criminal Law Amendments Act of 1988

    Pub. L. 100–690 title VII § 7015 · 102 Stat. 4181

    Substituted · 18 U.S.C. § 31

    Pub. L. 100–690 substituted “door is opened” for “door in opened” in definition of “in flight”

    Source evidence

    Code amendment note
    Pub. L. 100–690 substituted “door is opened” for “door in opened” in definition of “in flight”.

    Enacted provision · exact public law section
    SEC. 7015. CORRECTION OF TYPOGRAPHICAL ERROR IN SECTION 31. Section 31 of title 18, United States Code, is amended by striking “door in opened” and inserting “door is opened”.

  6. Pub. L. 103–272 § 5(e)(1) · 108 Stat. 745

    Substituted · 18 U.S.C. § 31

    Pub. L. 103–272 substituted “sections 40102(a) and 46501 of title 49” for “the Federal Aviation Act of 1958, as amended” in par. beginning with definition of “Aircraft engine”

    Source evidence

    Code amendment note
    Pub. L. 103–272 substituted “sections 40102(a) and 46501 of title 49” for “the Federal Aviation Act of 1958, as amended” in par. beginning with definition of “Aircraft engine”.

    Enacted provision · exact public law section
    (1) In section 31, strike “the Federal Aviation Act of 1958, as amended” and substitute “sections 40102(a) and 46501 of title 49”.

  7. Wendell H. Ford Aviation Investment and Reform Act for the 21st Century

    Pub. L. 106–181 title V § 506(b) · 114 Stat. 61

    1. Added · 18 U.S.C. § 31

      Pub. L. 106–181 added subsecs. (a) and (b)

    2. Struck · 18 U.S.C. § 31

      Pub. L. 106–181 struck out former text which read as follows: “When used in this chapter the term—

    Source evidence

    Code amendment note
    Pub. L. 106–181 added subsecs. (a) and (b) and struck out former text which read as follows: “When used in this chapter the term—

    “ ‘Aircraft engine’, ‘air navigation facility’, ‘appliance’, ‘civil aircraft’, ‘foreign air commerce’, ‘interstate air commerce’, ‘landing area’, ‘overseas air commerce’, ‘propeller’, ‘spare part’ and ‘special aircraft jurisdiction of the United States’ shall have the meaning ascribed to those terms in sections 40102(a) and 46501 of title 49. “ ‘Motor vehicle’ means every description of carriage or other contrivance propelled or drawn by mechanical power and used for commercial purposes on the highways in the transportation of passengers, passengers and property, or property or cargo; “ ‘Destructive substance’ means any explosive substance, flammable material, infernal machine, or other chemical, mechanical, or radioactive device or matter of a combustible, contaminative, corrosive, or explosive nature; “ ‘Used for commercial purposes’ means the carriage of persons or property for any fare, fee, rate, charge or other consideration, or directly or indirectly in connection with any business, or other undertaking intended for profit; “ ‘In flight’ means any time from the moment all the external doors of an aircraft are closed following embarkation until the moment when any such door is opened for disembarkation. In the case of a forced landing the flight shall be deemed to continue until competent authorities take over the responsibility for the aircraft and the persons and property on board; and “ ‘In service’ means any time from the beginning of preflight preparation of the aircraft by ground personnel or by the crew for a specific flight until twenty-four hours after any landing; the period of service shall, in any event, extend for the entire period during which the aircraft is in flight.”

    Enacted provision · exact public law section
    (b) Definitions.— Section 31 of title 18, United States Code, is amended by striking all after the section heading and inserting the following: “(a) Definitions.— In this chapter, the following definitions apply: “(1) Aircraft.— The term ‘aircraft’ means a civil, military, or public contrivance invented, used, or designed to navigate, fly, or travel in the air. “(2) Aviation quality.— The term ‘aviation quality’, with respect to a part of an aircraft or space vehicle, means the quality of having been manufactured, constructed, produced, maintained, repaired, overhauled, rebuilt, reconditioned, or restored in conformity with applicable standards specified by law (including applicable regulations). “(3) Destructive substance.— The term ‘destructive substance’ means an explosive substance, flammable material, infernal machine, or other chemical, mechanical, or radioactive device or matter of a combustible, contaminative, corrosive, or explosive nature. “(4) In flight.— The term ‘in flight’ means— “(A) any time from the moment at which all the external doors of an aircraft are closed following embarkation until the moment when any such door is opened for disembarkation; and “(B) in the case of a forced landing, until competent authorities take over the responsibility for the aircraft and the persons and property on board. “(5) In service.— The term ‘in service’ means— “(A) any time from the beginning of preflight preparation of an aircraft by ground personnel or by the crew for a specific flight until 24 hours after any landing; and “(B) in any event includes the entire period during which the aircraft is in flight. “(6) Motor vehicle.— The term ‘motor vehicle’ means every description of carriage or other contrivance propelled or drawn by mechanical power and used for commercial purposes on the highways in the transportation of passengers, passengers and property, or property or cargo. “(7) Part.— The term ‘part’ means a frame, assembly, component, appliance, engine, propeller, material, part, spare part, piece, section, or related integral or auxiliary equipment. “(8) Space vehicle.— The term ‘space vehicle’ means a man-made device, either manned or unmanned, designed for operation beyond the Earth’s atmosphere. “(9) State.— The term ‘State’ means a State of the United States, the District of Columbia, and any commonwealth, territory, or possession of the United States. “(10) Used for commercial purposes.— The term ‘used for commercial purposes’ means the carriage of persons or property for any fare, fee, rate, charge or other consideration, or directly or indirectly in connection with any business, or other undertaking intended for profit. “(b) Terms Defined in Other Law.— In this chapter, the terms ‘aircraft engine’, ‘air navigation facility’, ‘appliance’, ‘civil aircraft’, ‘foreign air commerce’, ‘interstate air commerce’, ‘landing area’, ‘overseas air commerce’, ‘propeller’, ‘spare part’, and ‘special aircraft jurisdiction of the United States’ have the meanings given those terms in sections 40102(a) and 46501 of title 49.”.

    Effective date note
    Amendment by Pub. L. 106–181 applicable only to fiscal years beginning after Sept. 30, 1999, see section 3 of Pub. L. 106–181, set out as a note under section 106 of Title 49, Transportation.

9 of 10 references resolved to an enrolled provision · 1 partial

Editorial Notes

Amendments1984–2000 · 4 rounds

2000

Pub. L. 106–181 added subsecs. (a) and (b) and struck out former text which read as follows: “When used in this chapter the term—

“ ‘Aircraft engine’, ‘air navigation facility’, ‘appliance’, ‘civil aircraft’, ‘foreign air commerce’, ‘interstate air commerce’, ‘landing area’, ‘overseas air commerce’, ‘propeller’, ‘spare part’ and ‘special aircraft jurisdiction of the United States’ shall have the meaning ascribed to those terms in sections 40102(a) and 46501 of title 49.

“ ‘Motor vehicle’ means every description of carriage or other contrivance propelled or drawn by mechanical power and used for commercial purposes on the highways in the transportation of passengers, passengers and property, or property or cargo;

“ ‘Destructive substance’ means any explosive substance, flammable material, infernal machine, or other chemical, mechanical, or radioactive device or matter of a combustible, contaminative, corrosive, or explosive nature;

“ ‘Used for commercial purposes’ means the carriage of persons or property for any fare, fee, rate, charge or other consideration, or directly or indirectly in connection with any business, or other undertaking intended for profit;

“ ‘In flight’ means any time from the moment all the external doors of an aircraft are closed following embarkation until the moment when any such door is opened for disembarkation. In the case of a forced landing the flight shall be deemed to continue until competent authorities take over the responsibility for the aircraft and the persons and property on board; and

“ ‘In service’ means any time from the beginning of preflight preparation of the aircraft by ground personnel or by the crew for a specific flight until twenty-four hours after any landing; the period of service shall, in any event, extend for the entire period during which the aircraft is in flight.”

1994

Pub. L. 103–272 substituted “sections 40102(a) and 46501 of title 49” for “the Federal Aviation Act of 1958, as amended” in par. beginning with definition of “Aircraft engine”.

1988

Pub. L. 100–690 substituted “door is opened” for “door in opened” in definition of “in flight”.

1984

Pub. L. 98–473, § 2013(a)(1), in first par. struck out “and” before “spare part”, inserted “and ‘special aircraft jurisdiction of the United States’ ”, and substituted “Federal Aviation Act of 1958” for “Civil Aeronautics Act of 1938”.

Pub. L. 98–473, § 1010, substituted “passengers and property, or property or cargo” for “or passengers and property” in definition of motor vehicle.

Pub. L. 98–473, § 2013(a)(2)–(4), inserted definitions of “in flight” and “in service”.

Statutory Notes and Related Subsidiaries

Effective Date of 2000 Amendment

Amendment by Pub. L. 106–181 applicable only to fiscal years beginning after , see section 3 of Pub. L. 106–181, set out as a note under section 106 of Title 49, Transportation.

Effective Date of 1984 Amendment

Pub. L. 98–473, title II, § 2015, , 98 Stat. 2190, provided that: “This part [part B (§§ 2011–2015) of chapter XX of title II of Pub. L. 98–473, see Short Title of 1984 Amendment note below] shall become effective on the date of the enactment of this joint resolution [].”

Short Title of 2000 Amendment

Pub. L. 106–181, title V, § 506(a), , 114 Stat. 136, provided that: “This section [enacting section 38 of this title and amending this section and section 2516 of this title] may be cited as the ‘Aircraft Safety Act of 2000’.”

Short Title of 1984 Amendment

Pub. L. 98–473, title II, § 2011, , 98 Stat. 2187, provided that: “This part [part B (§§ 2011–2015) of chapter XX of title II of Pub. L. 98–473, amending this section, section 32 of this title, and sections 1301, 1471, and 1472 of former Title 49, Transportation, and enacting provisions set out as notes under this section] may be cited as the ‘Aircraft Sabotage Act’.”

Statement of Findings and Purpose for 1984 Amendment

Pub. L. 98–473, title II, § 2012, , 98 Stat. 2187, provided that:

“The Congress hereby finds that—

“(1)

the Convention for the Suppression of Unlawful Acts Against the Safety of Civil Aviation (ratified by the United States on ) requires each contracting State to establish its jurisdiction over certain offenses affecting the safety of civil aviation;

“(2)

such offenses place innocent lives in jeopardy, endanger national security, affect domestic tranquility, gravely affect interstate and foreign commerce, and are offenses against the law of nations; and

“(3)

the purpose of this subtitle [probably means part B (§§ 2011–2015) of chapter XX of title II of Pub. L. 98–473, see Short Title of 1984 Amendment note above] is to implement fully the Convention for the Suppression of Unlawful Acts Against the Safety of Civil Aviation and to expand the protection accorded to aircraft and related facilities.”

Credits

1956–2000 · 5 acts
  1. 1956Added July 14, 1956, ch. 595, § 1, 70 Stat. 538
  2. 1984amended Pub. L. 98–473, title II, §§ 1010, 2013(a), , 98 Stat. 2141, 2187
  3. 1988Pub. L. 100–690, title VII, § 7015, , 102 Stat. 4395
  4. 1994Pub. L. 103–272, § 5(e)(1), , 108 Stat. 1373
  5. 2000Pub. L. 106–181, title V, § 506(b), , 114 Stat. 136.
Show as published

(Added July 14, 1956, ch. 595, § 1, 70 Stat. 538; amended Pub. L. 98–473, title II, §§ 1010, 2013(a), , 98 Stat. 2141, 2187; Pub. L. 100–690, title VII, § 7015, , 102 Stat. 4395; Pub. L. 103–272, § 5(e)(1), , 108 Stat. 1373; Pub. L. 106–181, title V, § 506(b), , 114 Stat. 136.)

Parsed from the official OLRC USLM XML in data/usc_all/usc18.xml · release point 119-108 · OLRC build 2026-05-04

USLM identifier /us/usc/t18/s31