Airworthiness: An Introduction to Aircraft Certification—A Guide to Understanding JAA, EASA, and FAA Standards

Except as provided in paragraphs (b) and (c) of this section and FAR 91.701 and 91.703, [22] this part prescribes rules governing the operation of aircraft (other than moored balloons, kites, unmanned rockets, and unmanned free balloons, which are governed by FAR 101, and ultralight vehicles operated in accordance with FAR 103) within the United States, including the waters within three nautical miles of the US coast.
Each person operating an aircraft in the airspace overlying the waters between three and 12 nautical miles from the coast of the United States must comply with FAR 91.1 through 91.21
(a) Except as provided in FAR 91.715, [23] no person may operate a civil aircraft unless it has within it the following: (1) an appropriate and current airworthiness certificate .
(c) No person may operate an aircraft with a fuel tank installed within the passenger compartment or a baggage compartment unless the installation was accomplished pursuant to FAR 43, and a copy of FAA Form 337 authorizing that installation is on board the aircraft.
(d) No person may operate a civil airplane (domestic or foreign) into or out of an airport in the United States unless it complies with the fuel venting and exhaust emissions requirements of FAR 34.