High Seas — Jurisdiction on — Protective Jurisdiction — Helsingfors Liquor Treaty, 1925 — International Maritime Routes in the Gulf of Finland — Whether Excluded from the Twelve-Mile Zone.

Treaties — Multilateral Treaties — Particular Treaties in parimateria between Signatories to the Multilateral Treaties — High Seas — Hovering Laws — Helsingfors Liquor Treaty of 1925 — Special Agreement between Some of the Signatories thereto — International Maritime Routes in the Gulf of Finland