14 C.F.R. § 103.13 Operation near aircraft; right-of-way rules.
Title 14 - Aeronautics and Space
(a) Each person operating an ultralight vehicle shall maintain vigilance so as to see and avoid aircraft and shall yield the right-of-way to all aircraft. (b) No person may operate an ultralight vehicle in a manner that creates a collision hazard with respect to any aircraft. (c) Powered ultralights shall yield the right-of-way to unpowered ultralights.
Title 14: Aeronautics and Space
PART 103—ULTRALIGHT VEHICLES
Subpart B—Operating Rules
§ 103.13 Operation near aircraft; right-of-way rules.