36 CFR § 327.4 - Aircraft.
(a) This section pertains to all aircraft including, but not limited to, airplanes, seaplanes, helicopters, ultra-light aircraft, motorized hang gliders, hot air balloons, any non-powered flight devices or any other such equipment.
(b) The operation of aircraft on project lands at locations other than those designated by the District Commander is prohibited. This provision shall not be applicable to aircraft engaged on official business of Federal, state or local governments or law enforcement agencies, aircraft used in emergency rescue in accordance with the directions of the District Commander or aircraft forced to land due to circumstances beyond the control of the operator.
(c) No person shall operate any aircraft while on or above project waters or project lands in a careless, negligent or reckless manner so as to endanger any person, property or environmental feature.
(d) Nothing in this section bestows authority to deviate from rules and regulations or prescribed standards of the appropriate State Aeronautical Agency, or the Federal Aviation Administration, including, but not limited to, regulations and standards concerning pilot certifications or ratings, and airspace requirements.
(e) Except in extreme emergencies threatening human life or serious property loss, the air delivery or retrieval of any person, material or equipment by parachute, balloon, helicopter or other means onto or from project lands or waters without written permission of the District Commander is prohibited.
(f) In addition to the provisions in paragraphs (a) through (e) of this section, seaplanes are subject to the following restrictions:
(1) Such use is limited to aircraft utilized for water landings and takeoff, in this part called seaplanes, at the risk of owner, operator and passenger(s).
(2) Seaplane operations contrary to the prohibitions or restrictions established by the District Commander (pursuant to part 328 of this title) are prohibited. The responsibility to ascertain whether seaplane operations are prohibited or restricted is incumbent upon the person(s) contemplating the use of, or using, such waters.
(3) All operations of seaplanes while upon project waters shall be in accordance with U.S. Coast Guard navigation rules for powerboats or vessels and § 327.3.
(4) Seaplanes on project waters and lands in excess of 24 hours shall be securely moored at mooring facilities and at locations permitted by the District Commander. Seaplanes may be temporarily moored on project waters and lands, except in areas prohibited by the District Commander, for periods less than 24 hours providing:
(i) The mooring is safe, secure, and accomplished so as not to damage the rights of the Government or members of the public, and
(ii) The operator remains in the vicinity of the seaplane and reasonably available to relocate the seaplane if necessary.
(5) Commercial operation of seaplanes from project waters is prohibited without written approval of the District Commander following consultation with and necessary clearance from the Federal Aviation Administration (FAA) and other appropriate public authorities and affected interests.
(6) Seaplanes may not be operated at Corps projects between sunset and sunrise unless approved by the District Commander.