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Historical records or prior inspection reports show a count of 16 U.S. inspections of foreign Antarctic research stations since 1963.
Unable to access key official records (Antarctic Treaty Secretariat Inspections Database and some State Department PDF reports) due to access restrictions or technical errors; reliable verification of the precise count (16th since 1963) requires those primary inspection records. Recommend re-checking the Antarctic Treaty Secretariat inspections database and the State Department inspection reports to confirm the total; follow up after 2026-01-29 if access remains constrained.