14 C.F.R. §§ 21.173–21.189

§21.173. Eligibility.

14 C.F.R. § 21.173

Any registered owner of a U.S.-registered aircraft (or the agent of the owner) may apply for an airworthiness certificate for that aircraft. An application for an airworthiness certificate must be made in a form and manner acceptable to the FAA, and may be submitted to any FAA office.

Notes, amendments, and revision history

Amendments

[Amdt. 21-26, 34 FR 15244, Sept. 30, 1969]

Source

Source: Docket No. 5085, 29 FR 14569, Oct. 24, 1964, unless otherwise noted.

Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.

Amendments

[Amdt. 21-26, 34 FR 15244, Sept. 30, 1969]

§21.175. Airworthiness certificates: classification.

14 C.F.R. § 21.175

(a)

Standard airworthiness certificates are airworthiness certificates issued for aircraft type certificated:

(1)

In the normal, utility, acrobatic, commuter, or transport category;

(2)

As manned free balloons; or

(3)

As special classes of aircraft.

(b)

Special airworthiness certificates are airworthiness certificates issued for—

(1)

Aircraft type-certificated in the primary, restricted, provisional, or limited category;

(2)

Aircraft certificated in the light-sport category;

(3)

Aircraft operating for an experimental purpose; or

(4)

Aircraft operating under a special flight permit.

Notes, amendments, and revision history

Amendments

[Docket No. FAA-2023-1377, Amdt. 21-109, 90 FR 35205, July 24, 2025]

Source

Source: Docket No. 5085, 29 FR 14569, Oct. 24, 1964, unless otherwise noted.

Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.

Amendments

[Docket No. FAA-2023-1377, Amdt. 21-109, 90 FR 35205, July 24, 2025]

§21.177. Amendment or modification.

14 C.F.R. § 21.177

An airworthiness certificate may be amended or modified only upon application to the FAA.

Notes, amendments, and revision history

Source

Source: Docket No. 5085, 29 FR 14569, Oct. 24, 1964, unless otherwise noted.

Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.

§21.179. Transferability.

14 C.F.R. § 21.179

An airworthiness certificate is transferred with the aircraft.

Notes, amendments, and revision history

Source

Source: Docket No. 5085, 29 FR 14569, Oct. 24, 1964, unless otherwise noted.

Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.

§21.181. Duration.

14 C.F.R. § 21.181

(a)

Unless sooner surrendered, suspended, revoked, or a termination date is otherwise established by the FAA, airworthiness certificates are effective as long as the aircraft is registered in the United States and as follows:

(1)

Standard airworthiness certificates and special airworthiness certificates issued for aircraft certificated in the primary, restricted, or limited category are effective as long as the maintenance, preventive maintenance, and alterations are performed in accordance with parts 43 and 91 of this chapter.

(2)

A special flight permit is effective for the period of time specified in the permit.

(3)

A special airworthiness certificate in the light-sport category is effective as long as all of the following conditions are met.

(i)

Except as specified in paragraph (a)(3)(iv) of this section, the aircraft meets the eligibility criteria for the issuance of an airworthiness certificate in the light-sport category specified in § 21.190(b).

(ii)

The aircraft conforms to its original or properly altered configuration.

(iii)

The aircraft has no unsafe condition and is not likely to develop an unsafe condition.

(iv)

For aircraft originally certificated prior to July 24, 2026, the aircraft meets all of the following conditions:

(A)

A maximum takeoff weight of not more than 1,320 pounds (600 kilograms) for aircraft not intended for operation on water or 1,430 pounds (650 kilograms) for an aircraft intended for operation on water.

(B)

A maximum airspeed in level flight with maximum continuous power (VH) of not more than 120 knots CAS under standard atmospheric conditions at sea level.

(C)

A maximum never-exceed speed (V<I>NE</I>) of not more than 120 knots CAS for a glider.

(D)

A maximum stalling speed or minimum steady flight speed without the use of lift-enhancing devices (VS1) of not more than 45 knots CAS at the aircraft's maximum certificated takeoff weight and most critical center of gravity.

(E)

A maximum seating capacity of no more than two persons, including the pilot.

(F)

A single, reciprocating engine, if powered.

(G)

A fixed or ground-adjustable propeller if a powered aircraft other than a powered glider.

(H)

A fixed or feathering propeller system if a powered glider.

(I)

A nonpressurized cabin, if equipped with a cabin.

(J)

Fixed landing gear, except for an aircraft intended for operation on water or a glider.

(K)

Fixed or retractable landing gear, or a hull, for an aircraft intended for operation on water.

(L)

Fixed or retractable landing gear for a glider.

(4)

The duration of an experimental airworthiness certificate issued for research and development, showing compliance with regulations, crew training, or market survey is effective for 3 years from the date of issue or renewal unless the FAA prescribes a shorter period.

(5)

The duration of an experimental airworthiness certificate issued for exhibition, air-racing, operating amateur-built aircraft, operating primary kit-built aircraft, operating light-sport aircraft, operating light-sport category kit-built aircraft, and operating former light-sport category aircraft, and operating former military aircraft is unlimited, unless the FAA establishes a specific period for good cause.

(b)

The owner, operator, or bailee of the aircraft must, upon request, make it available for inspection by the FAA.

(c)

Upon suspension, revocation, or termination by order of the FAA of an airworthiness certificate, the owner, operator, or bailee of an aircraft must, upon request, surrender the certificate to the FAA.

Notes, amendments, and revision history

Amendments

[Amdt. 21-21, 33 FR 6858, May 7, 1968, as amended by Amdt. 21-49, 44 FR 46781, Aug. 9, 1979; Amdt. 21-70, 57 FR 41368, Sept. 9, 1992; Amdt. 21-85, 69 FR 44861, July 27, 2004; Amdt. 21-109, 90 FR 35205, July 24, 2025; Amdt. No. 21-109, 90 FR 35206, July 24, 2025]

Source

Source: Docket No. 5085, 29 FR 14569, Oct. 24, 1964, unless otherwise noted.

Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.

Amendments

[Amdt. 21-21, 33 FR 6858, May 7, 1968, as amended by Amdt. 21-49, 44 FR 46781, Aug. 9, 1979; Amdt. 21-70, 57 FR 41368, Sept. 9, 1992; Amdt. 21-85, 69 FR 44861, July 27, 2004; Amdt. 21-109, 90 FR 35205, July 24, 2025; Amdt. No. 21-109, 90 FR 35206, July 24, 2025]

§21.182. Aircraft identification.

14 C.F.R. § 21.182

(a)

Except as provided in paragraph (b) of this section, each applicant for an airworthiness certificate under this subpart must show that his aircraft is identified as prescribed in § 45.11 of this chapter.

(b)

Paragraph (a) of this section does not apply to applicants for the following—

(1)

A special flight permit.

(2)

An experimental airworthiness certificate issued for the purposes of research and development, showing compliance with regulations, crew training, exhibition, air racing, market surveys, or operating former military aircraft.

(3)

A change from one airworthiness classification to another, for an aircraft already identified as prescribed in § 45.11.

Notes, amendments, and revision history

Amendments

[Amdt. 21-13, 32 FR 188, Jan. 10, 1967, as amended by Amdt. 21-51, 45 FR 60170, Sept. 11, 1980; Amdt. 21-70, 57 FR 41368, Sept. 9, 1992; Amdt. 21-85, 69 FR 44862, July 27, 2004; Amdt. No. 21-109, 90 FR 35206, July 24, 2025]

Source

Source: Docket No. 5085, 29 FR 14569, Oct. 24, 1964, unless otherwise noted.

Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.

Amendments

[Amdt. 21-13, 32 FR 188, Jan. 10, 1967, as amended by Amdt. 21-51, 45 FR 60170, Sept. 11, 1980; Amdt. 21-70, 57 FR 41368, Sept. 9, 1992; Amdt. 21-85, 69 FR 44862, July 27, 2004; Amdt. No. 21-109, 90 FR 35206, July 24, 2025]

§21.183. Issue of standard airworthiness certificates for normal, utility, acrobatic, commuter, and transport category aircraft; manned free balloons; and special classes of aircraft.

14 C.F.R. § 21.183

(a)

New aircraft manufactured under a production certificate. An applicant for a standard airworthiness certificate for a new aircraft manufactured under a production certificate is entitled to a standard airworthiness certificate without further showing, except that the FAA may inspect the aircraft to determine conformity to the type design and condition for safe operation.

(b)

New aircraft manufactured under type certificate. An applicant for a standard airworthiness certificate for a new aircraft manufactured under a type certificate is entitled to a standard airworthiness certificate upon presentation, by the holder or licensee of the type certificate, of the statement of conformity prescribed in § 21.130 if the FAA finds after inspection that the aircraft conforms to the type design and is in condition for safe operation.

(c)

Import aircraft. An applicant for a standard airworthiness certificate for an import aircraft is entitled to that certificate if—

(1)

The aircraft is type certificated in accordance with § 21.21 or § 21.29 and produced under the authority of another State of Manufacture;

(2)

The State of Manufacture certifies, in accordance with the export provisions of an agreement with the United States for import of that aircraft, that the aircraft conforms to the type design and is in condition for safe operation; and

(3)

The FAA finds that the aircraft conforms to the type design and is in condition for safe operation.

(d)

Used aircraft and surplus aircraft of the U.S. Armed Forces. An applicant for a standard airworthiness certificate for a used aircraft or surplus aircraft of the U.S. Armed Forces is entitled to a standard airworthiness certificate if—

(1)

The applicant presents evidence to the FAA that the aircraft conforms to a type design approved under a type certificate or a supplemental type certificate and to applicable Airworthiness Directives;

(2)

The aircraft (except an experimentally certificated aircraft that previously had been issued a different airworthiness certificate under this section) has been inspected in accordance with the performance rules for 100-hour inspections set forth in § 43.15 of this chapter, or an equivalent performance standard acceptable to the FAA, and found airworthy by—

(i)

The manufacturer;

(ii)

The holder of a repair station certificate as provided in Part 145 of this chapter;

(iii)

The holder of a mechanic certificate as authorized in Part 65 of this chapter;

(iv)

The holder of a certificate issued under part 121 of this chapter, and having a maintenance and inspection organization appropriate to the aircraft type; or

(v)

A foreign maintenance organization appropriately certificated by an exporting authority with whose country the United States has a bilateral agreement that includes acceptance of this aircraft category by the United States for import. An acceptable inspection must have been completed while the aircraft was operated on the registry of the exporting authority and within 60 days of submitting the application for a United States airworthiness certificate;

(3)

The FAA finds after inspection, that the aircraft conforms to the type design, and is in condition for safe operation.

(e)

Noise requirements. Notwithstanding all other provisions of this section, the following must be complied with for the original issuance of a standard airworthiness certificate:

(1)

For transport category large airplanes and jet (turbojet powered) airplanes that have not had any flight time before the dates specified in § 36.1(d), no standard airworthiness certificate is originally issued under this section unless the FAA finds that the type design complies with the noise requirements in § 36.1(d) in addition to the applicable airworthiness requirements in this section. For import airplanes, compliance with this paragraph is shown if the country in which the airplane was manufactured certifies, and the FAA finds, that § 36.1(d) (or the applicable airplane noise requirements of the country in which the airplane was manufactured and any other requirements the FAA may prescribe to provide noise levels no greater than those provided by compliance with § 36.1(d)) and paragraph (c) of this section are complied with.

(2)

For normal, utility, acrobatic, commuter, or transport category propeller driven small airplanes (except for those airplanes that are designed for “agricultural aircraft operations” (as defined in § 137.3 of this chapter, as effective on January 1, 1966) or for dispensing fire fighting materials to which § 36.1583 of this chapter does not apply) that have not had any flight time before the applicable date specified in part 36 of this chapter, no standard airworthiness certificate is originally issued under this section unless the applicant shows that the type design complies with the applicable noise requirements of part 36 of this chapter in addition to the applicable airworthiness requirements in this section. For import airplanes, compliance with this paragraph is shown if the country in which the airplane was manufactured certifies, and the FAA finds, that the applicable requirements of part of this chapter (or the applicable airplane noise requirements of the country in which the airplane was manufactured and any other requirements the FAA may prescribe to provide noise levels no greater than those provided by compliance with the applicable requirements of part 36 of this chapter) and paragraph (c) of this section are complied with.

(f)

Passenger emergency exit requirements. Notwithstanding all other provisions of this section, each applicant for issuance of a standard airworthiness certificate for a transport category airplane manufactured after October 16, 1987, must show that the airplane meets the requirements of § 25.807(c)(7) in effect on July 24, 1989. For the purposes of this paragraph, the date of manufacture of an airplane is the date the inspection acceptance records reflect that the airplane is complete and meets the FAA-approved type design data.

(g)

Fuel venting and exhaust emission requirements. Notwithstanding all other provisions of this section, and irrespective of the date of application, no airworthiness certificate is issued, on and after the dates specified in part 34 for the airplanes specified therein, unless the airplane complies with the applicable requirements of that part.

(h)

New aircraft manufactured under the provisions of § 21.6(b). An applicant for a standard airworthiness certificate for a new aircraft manufactured under the provisions of § 21.6(b) is entitled to a standard airworthiness certificate if—

(1)

The applicant presents evidence to the FAA that the aircraft conforms to a type design approved under a type certificate or supplemental type certificate and to applicable Airworthiness Directives;

(2)

The aircraft has been inspected in accordance with the performance rules for a 100-hour inspections set forth in § 43.15 of this chapter and found airworthy by a person specified in paragraph (d)(2) of this section; and

(3)

The FAA finds after inspection, that the aircraft conforms to the type design, and is in condition for safe operation.

(i)

[Reserved]

(j)

Fuel efficiency requirements. No original standard airworthiness certificate may be issued under this section unless the applicant has demonstrated that the type design complies with the applicable fuel efficiency requirements of part 38 of this chapter.

Notes, amendments, and revision history

Amendments

[Amdt. 21-17, 32 FR 14927, Oct. 28, 1967]

Source

Source: Docket No. 5085, 29 FR 14569, Oct. 24, 1964, unless otherwise noted.

Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.

Amendments

[Amdt. 21-17, 32 FR 14927, Oct. 28, 1967]

§21.184. Issue of special airworthiness certificates for primary category aircraft.

14 C.F.R. § 21.184

(a)

New primary category aircraft manufactured under a production certificate. An applicant for an original, special airworthiness certificate-primary category for a new aircraft that meets the criteria of § 21.24(a)(1), manufactured under a production certificate, including aircraft assembled by another person from a kit provided by the holder of the production certificate and under the supervision and quality control of that holder, is entitled to a special airworthiness certificate without further showing, except that the FAA may inspect the aircraft to determine conformity to the type design and condition for safe operation.

(b)

Imported aircraft. An applicant for a special airworthiness certificate-primary category for an imported aircraft type certificated under § 21.29 is entitled to a special airworthiness certificate if the civil airworthiness authority of the country in which the aircraft was manufactured certifies, and the FAA finds after inspection, that the aircraft conforms to an approved type design that meets the criteria of § 21.24(a)(1) and is in a condition for safe operation.

(c)

Aircraft having a current standard airworthiness certificate. An applicant for a special airworthiness certificate-primary category, for an aircraft having a current standard airworthiness certificate that meets the criteria of § 21.24(a)(1), may obtain the primary category certificate in exchange for its standard airworthiness certificate through the supplemental type certification process. For the purposes of this paragraph, a current standard airworthiness certificate means that the aircraft conforms to its approved normal, utility, or acrobatic type design, complies with all applicable airworthiness directives, has been inspected and found airworthy within the last 12 calendar months in accordance with § 91.409(a)(1) of this chapter, and is found to be in a condition for safe operation by the FAA.

(d)

Other aircraft. An applicant for a special airworthiness certificate-primary category for an aircraft that meets the criteria of § 21.24(a)(1), and is not covered by paragraph (a), (b), or (c) of this section, is entitled to a special airworthiness certificate if—

(1)

The applicant presents evidence to the FAA that the aircraft conforms to an approved primary, normal, utility, or acrobatic type design, including compliance with all applicable airworthiness directives;

(2)

The aircraft has been inspected and found airworthy within the past 12 calendar months in accordance with § 91.409(a)(1) of this chapter and;

(3)

The aircraft is found by the FAA to conform to an approved type design and to be in a condition for safe operation.

(e)

Multiple-category airworthiness certificates— in the primary category and any other category will not be issued; a primary category aircraft may hold only one airworthiness certificate.

Notes, amendments, and revision history

Amendments

[Doc. No. 23345, 57 FR 41368, Sept. 9, 1992, as amended by Amdt. 21-70, 57 FR 43776, Sept. 22, 1992]

Source

Source: Docket No. 5085, 29 FR 14569, Oct. 24, 1964, unless otherwise noted.

Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.

Amendments

[Doc. No. 23345, 57 FR 41368, Sept. 9, 1992, as amended by Amdt. 21-70, 57 FR 43776, Sept. 22, 1992]

§21.185. Issue of airworthiness certificates for restricted category aircraft.

14 C.F.R. § 21.185

(a)

Aircraft manufactured under a production certificate or type certificate. An applicant for a restricted category airworthiness certificate for an aircraft type certificated in the restricted category, that was not previously type certificated in any other category, must comply with § 21.183(a) or (b), as applicable. A used aircraft must conform to its type certificate and be in a condition for safe operation.

(b)

Other aircraft. An applicant for an airworthiness certificate in the restricted category is entitled to an airworthiness certificate if—

(1)

The aircraft is type certificated for a special purpose operation in the restricted category;

(2)

The aircraft was—

(i)

Manufactured in accordance with the requirements of, and accepted for use by, the U.S. Armed Forces and has a service history with the U.S. Armed Forces acceptable to the FAA; or

(ii)

Previously type certificated in another category; and

(3)

The aircraft has been inspected by the FAA and found by him to be in a good state of preservation and repair and in a condition for safe operation.

(c)

Import aircraft. An applicant for the original issue of a special airworthiness certificate for a restricted category import aircraft is entitled to that certificate if—

(1)

The aircraft is type-certificated in accordance with § 21.25 or § 21.29 and produced under the authority of another State of Manufacture;

(2)

The State of Manufacture certifies, in accordance with the export provisions of an agreement with the United States for import of that aircraft that the aircraft conforms to the type design and is in condition for safe operation; and

(3)

The FAA finds that the aircraft conforms to the type design and is in condition for safe operation.

(d)

Noise requirements. For propeller-driven small airplanes (except airplanes designed for “agricultural aircraft operations,” as defined in § 137.3 of this chapter, as effective on January 1, 1966, or for dispensing fire fighting materials) that have not had any flight time before the applicable date specified in Part 36 of this chapter, and notwithstanding the other provisions of this section, no original restricted category airworthiness certificate is issued under this section unless the FAA finds that the type design complies with the applicable noise requirements of Part 36 of this chapter in addition to the applicable airworthiness requirements of this section. For import airplanes, compliance with this paragraph is shown if the country in which the airplane was manufactured certifies, and the FAA finds, that the applicable requirements of Part 36 of this chapter (or the applicable airplane noise requirements of the country in which the airplane was manufactured and any other requirements the FAA may prescribe to provide noise levels no greater than those provided by compliance with the applicable requirements of Part 36 of this chapter) and paragraph (c) of this section are complied with.

Notes, amendments, and revision history

Amendments

[Amdt. 21-10, 31 FR 9211, July 6, 1966, as amended by Amdt. 21-32, 35 FR 10202, June 23, 1970; Amdt. 21-42, 40 FR 1034, Jan. 6, 1975; Amdt. 21-92, 74 FR 53389, Oct. 16, 2009; Amdt. 21-92, 74 FR 53389, Oct. 16, 2009; Amdt. 21-92A, 75 FR 9095, Mar. 1, 2010; Amdt. 21-109, 90 FR 35206, July 24, 2025]

Source

Source: Docket No. 5085, 29 FR 14569, Oct. 24, 1964, unless otherwise noted.

Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.

Amendments

[Amdt. 21-10, 31 FR 9211, July 6, 1966, as amended by Amdt. 21-32, 35 FR 10202, June 23, 1970; Amdt. 21-42, 40 FR 1034, Jan. 6, 1975; Amdt. 21-92, 74 FR 53389, Oct. 16, 2009; Amdt. 21-92, 74 FR 53389, Oct. 16, 2009; Amdt. 21-92A, 75 FR 9095, Mar. 1, 2010; Amdt. 21-109, 90 FR 35206, July 24, 2025]

§21.187. Issue of multiple airworthiness certifications for restricted category aircraft.

14 C.F.R. § 21.187

(a)

An applicant for an airworthiness certificate in the restricted category, and in one or more other categories except primary category, is entitled to the certificate, if—

(1)

The applicant shows compliance with the requirements for each category, when the aircraft is in the configuration for that category;

(2)

The applicant shows that the aircraft can be converted from one category to another by removing or adding equipment by simple mechanical means;

(3)

The aircraft complies with the applicable requirements of part 34 of this subchapter; and

(4)

The airplane complies with the applicable requirements of part 38 of this subchapter.

(b)

The operator of an aircraft certificated under this section must have the aircraft inspected by the FAA, or by a certificated mechanic with an appropriate airframe rating, to determine airworthiness each time the aircraft is converted from the restricted category to another category for the carriage of passengers for compensation or hire, unless the FAA finds this unnecessary for safety in a particular case.

(c)

The aircraft complies with the applicable requirements of part 34.

Notes, amendments, and revision history

Amendments

[Doc. No. 5085, 29 FR 14569, Oct. 24, 1964, as amended by Amdt. 21-68, 55 FR 32860, Aug. 10, 1990; Amdt. 21-70, 57 FR 41369, Sept. 9, 1992; Amdt. No. 21-107, 89 FR 12654, Feb. 16, 2024; Amdt. 21-109, 90 FR 35206, July 24, 2025]

Source

Source: Docket No. 5085, 29 FR 14569, Oct. 24, 1964, unless otherwise noted.

Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.

Amendments

[Doc. No. 5085, 29 FR 14569, Oct. 24, 1964, as amended by Amdt. 21-68, 55 FR 32860, Aug. 10, 1990; Amdt. 21-70, 57 FR 41369, Sept. 9, 1992; Amdt. No. 21-107, 89 FR 12654, Feb. 16, 2024; Amdt. 21-109, 90 FR 35206, July 24, 2025]

§21.189. Issue of airworthiness certificate for limited category aircraft.

14 C.F.R. § 21.189

(a)

An applicant for an airworthiness certificate for an aircraft in the limited category is entitled to the certificate when—

(1)

He shows that the aircraft has been previously issued a limited category type certificate and that the aircraft conforms to that type certificate; and

(2)

The FAA finds, after inspection (including a flight check by the applicant), that the aircraft is in a good state of preservation and repair and is in a condition for safe operation.

(b)

The FAA prescribes limitations and conditions necessary for safe operation.

Notes, amendments, and revision history

Amendments

[Doc. No. 5085, 29 FR 14570, Oct. 24, 1964, as amended by Amdt. 21-4, 30 FR 9437, July 29, 1965]

Source

Source: Docket No. 5085, 29 FR 14569, Oct. 24, 1964, unless otherwise noted.

Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.

Amendments

[Doc. No. 5085, 29 FR 14570, Oct. 24, 1964, as amended by Amdt. 21-4, 30 FR 9437, July 29, 1965]