States as international persons — In general — The beginning of State existence — Accession to independence of the Comoros — Consultation of populations of the islands making up the Comoros — Unilateral Declaration of Independence by Representative Assembly of the Comoros — Opposition of the island of Mayotte — Admission of the Comoros to membership of the United Nations — French law providing for separate self-determination for the inhabitants of Mayotte — Whether violation of international law — Charter of the United Nations, 1945 — Whether violation of the French Constitution, Article 53 — The law of France