Final answer:
The correct answer is b) Provisional registration. Flight authority refers to the legal permission granted to individuals or organizations to operate aircraft.
Step-by-step explanation:
The correct answer is b) Provisional registration.
Flight authority refers to the legal permission granted to individuals or organizations to operate aircraft. While options a) Special C of A, restricted; c) Specific purpose flight permit; and d) Special C of A, amateur built are all valid forms of flight authority, b) Provisional registration is not.
Provisional registration is a temporary registration issued for aircraft that do not meet all the requirements for full registration. It allows the aircraft to operate while necessary documentation and inspections are completed. Once the requirements are fulfilled, the provisional registration can be converted to full registration.