Nationality — Proof of.

Nationality — Expatriation — Loss of nationality — Polish law

Prisoners of War — Geneva Convention of 1929 — Article 23 — Meaning and effect of — Modification by Detaining Power of pay of its own officers — Whether such modification applicable to prisoners of war — Family allowances — Whether covered by Article 23.

Treaties of peace — Analogous instruments — Convention on the Settlement of Matters Arising out of the War and Occupation, 1952–1954 — Restitution — restitution of rights and interests-Chapter Ten of Convention — Conditions of restitution — Nationality of claimant — Discriminatory treatment — Meaning of — Measures constituting prejudice, deprivation or impairment of right — Geneva Convention of 1929 on Treatment of Prisoners of War — Article 23.