Under 14 CFR § 107.37(a), when another aircraft is sharing the airspace with a small UAS, the small unmanned aircraft —

Why: 14 CFR § 107.37(a) states: "Each small unmanned aircraft must yield the right of way to all aircraft, airborne vehicles, and launch and reentry vehicles... and may not pass over, under, or ahead of it unless well clear."

• Inverts the right-of-way rule; § 107.37(a) requires the small UAS to yield to all other aircraft, with no altitude-based exception that favors the UAS.
• Narrows the yield obligation to only unmanned traffic, when § 107.37(a) requires yielding to "all aircraft, airborne vehicles, and launch and reentry vehicles," manned or unmanned.