Treaties — Entry into force — Application to acts done between signature and entry into force of treaty — Option provisions concerning nationality — Purported exercise of option — Before entry into force of treaty — Treaty of Lausanne, 1923, Article 34.

Nationality — Option — Ottoman subject who was a native of a territory detached from Turkey after First World War — Article 34 of Treaty of Lausanne, 1923 — Option exercised before Treaty of Lausanne entered into force — The law of Egypt.