For it to be otherwise would require FAA Flight Standards District Office employees to be familiar with foreign law, which is not required for that job.
Incorrect, the FSDO Inspector is not required nor expected to be familiar with foreign law the applicant of the 61.75 License is
required and expected to know
from FSIMS
However, persons who operate a U.S.‑registered civil aircraft in an ICAO Member State country should be aware that some foreign countries may have additional operational and pilot certification requirements. Each pilot must inquire with that foreign country’s CAA and become familiar with that country’s operational and pilot certification requirements before operating a U.S.‑registered civil aircraft in that country.