What regulation governs the requirements for a type certificate?

The regulation that governs the requirements for a type certificate is found in 14 CFR Part 21. This part of the Code of Federal Regulations outlines the procedures and requirements for the issuance of type certificates, which are crucial for the configuration and airworthiness of aircraft. It specifies the criteria that manufacturers must meet to demonstrate that their aircraft designs are safe and comply with applicable regulations. Part 21 details the application processes, the data required for certification, and the responsibilities of the certificate holder.

The other options pertain to different aspects of aviation regulations. For instance, 14 CFR Part 25 primarily addresses airworthiness standards for transport category airplanes, detailing design and performance requirements but not the type certification process itself. CAR Part 3 is an older regulation that has been replaced by the modern FAA regulation, and while it pertains to certification, it reflects outdated standards. Finally, 14 CFR Part 43 covers maintenance, preventive maintenance, and alterations for aircraft, but it does not concern type certificates directly. Thus, 14 CFR Part 21 is specifically aligned with the requirements for obtaining a type certificate.