Final answer:
The Federal Aviation Regulations (FAR) Part 21.41 contains information on special flight permits in the United States.
Step-by-step explanation:
The information on special flight permits in the United States can be found in the Federal Aviation Regulations (FAR) Part 21.41. This FAR section outlines the requirements and procedures for obtaining a special flight permit, which is issued for aircraft that do not meet the standard airworthiness requirements. Special flight permits may be issued for purposes such as aircraft delivery, production flight testing, or transportation to a repair facility.