The British Mandate for Palestine was finally confirmed in 1922, the civil Mandate administration was formalized with the League of Nations' consent in 1923 following the ratification of which peace treaty signed in Palais de Rumine?
Permanent Mandates Commission (Palestine):  The civil Mandate administration was formalized with the League of Nations' consent in 1923 following the ratification of the Treaty of Lausanne.
i don't know