Territory — Sovereignty — Occupation of foreign territory in time of peace — Trieste — Military administration in two zones under terms of Peace Treaty with Italy, 1947 — London Memorandum, 1954, entitling Yugoslavia to extend its administration to Zone B — De facto exercise of sovereignty — Italian claims to Zone B — Whether Zone B to be regarded as Italian territory for purposes of social security law — Treaty of Osimo, 1975 — Retrospective recognition of Yugoslav sovereignty

War and armed conflict — Occupation — Peace treaties — The law of Italy