A US remote pilot travels abroad and wants to fly their FAA-registered drone in another country. What governs that operation?
Why →Part 107 governs operations in US airspace. Holding an FAA registration and a US remote pilot certificate does not authorize a pilot to fly in another country's airspace; the destination country's aviation authority sets the applicable rules. A pilot flying abroad must research and comply with local regulations, which may differ substantially from Part 107.
The trap →The worldwide-Part-107 option overextends the rule's reach; FAA authority stops at US airspace. The Remote-ID option treats a broadcast requirement as if it were blanket permission to fly anywhere.
Field note →This is the flip side of the foreign-registration questions: registration is country-specific, and so is operating authority. Crossing a border means you operate under that nation's rules, not the FAA's.