Title 14, Code of Federal Regulations (14 CFR)

• Part 21, Certification Procedures for Products and Parts
  • Part 21, subpart H, Airworthiness Certificates
• Part 45, Identification and Registration Marking
• Part 48, Registration and Marking Requirements for Small Unmanned Aircraft
• Part 91, subpart D, Special Flight Operations
• Section 91.715, Special flight authorizations for foreign civil aircraft.
• Part 375, Navigation of Foreign Civil Aircraft Within the United States

Orders

• 8130.2, Airworthiness Certification of Aircraft
• 8130.34, Airworthiness Certification of Unmanned Aircraft Systems and Optionally Piloted Aircraft

Advisory Circulars (AC)

• 20-27, Certification and Operation of Amateur-Built Aircraft
• 21-4, Special Flight Permits for Operation of Overweight Aircraft
• 21-12, Application for U.S. Airworthiness Certificate, FAA Form 8130-6 (Instructions for completing 8130-6) 
• 43.13-1, Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair 
• 45-2, Identification and Registration Marking 
• 45-4, Identification, marking, and placarding of aircraft issued special airworthiness certificates in the light-sport category (S-LSA) and aircraft issued experimental certificates for the purpose of operating light-sport aircraft (E-LSA) 
• 90-89, Amateur-Built Aircraft and Ultralight Flight Testing Handbook 
• 90-109, Transition to Unfamiliar Aircraft 
• 90-116, Additional Pilot Program for Phase I Flight Test 

Forms

• Form 8130-6, Application for U.S. Airworthiness
• Form 8130-12, Eligibility Statement, Amateur-Built Aircraft
• Form 8130-15, Light-Sport Aircraft Statement of Compliance
• Form AC 8050-88A, Light-Sport Aircraft Manufacturer's Affidavit

Additional Information and Guidance for Amateur-Built Aircraft

Additional Information and Guidance for Light Sport Aircraft