Section 103.13 - Operation near aircraft; right-of-way rules(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.