This Convention shall cease to apply to any person falling under the terms of section A if: ...
3. He has acquired a new nationality, and enjoys the protection of the country of his new nationality; or
4. He has voluntarily re-established himself in the country which he left or outside which he remained owing to fear of persecution; or
5. He can no longer, because the circumstances in connexion with which he has been recognized as a refugee have ceased to exist, continue to refuse to avail himself of the protection of the country of his nationality;
6. Being a person who has no nationality he is, because of the circumstances in connexion with which he has been recognized as a refugee have ceased to Exist, able to return to the country of his former habitul residence