In the United States, skydiving is a self-regulated sport, which means skydivers, in the US, voluntarily follow a set of basic safety requirements established by the U.S. Parachute Association. Federal requirements can be found in the Federal Aviation Regulations. Most of the regulations concern the aircraft, pilot and rules of flight. However, 14 CFR Part 105, "Parachute Operations" regulates when and where jumps may be made and designates the requirements for parachute equipment and packing. For example, 14 CFR Part 105 (subpart C) requires the person packing either the main chute or the reserve parachute to be a certificated rigger, which means he or she has taken an FAA-approved training course and has passed rigorous FAA testing.