11 2. If a State Party does not permit multiple nationality, it may require renunciation of other nationalities before nationality is recovered. ARTICLE 17 Limitations on Expulsion 1. A State Party shall not expel a person while a challenge or review of a decision to deny recognition of or to deprive that person’s nationality is pending before a competent administrative or judicial authority. 2. A State Party shall not expel a stateless person lawfully in its territory except on the ground of national security or public order. ARTICLE 18 Recognition and Protection of Stateless Persons 1. A State Party shall provide in law for the criteria for the attribution of the status of stateless person, as an interim measure. 2. A State Party shall guarantee to stateless persons in its territory humanitarian assistance and protection of universally recognised human rights, in conformity with its obligations under the African Charter and the human rights instruments of the United Nations. 3. A State Party shall provide to persons with the status of stateless person identity and travel documents, unless there are overriding issues of national security. ARTICLE 19 Succession of States and Nationality 1. In case of State succession, States Parties shall endeavour to regulate matters relating to nationality through international co-operation and bilateral and multilateral agreements. 2. A State Party shall take appropriate measures to prevent persons who, at the time of a State succession, had the nationality of a predecessor State, from becoming stateless as a result of the succession. 3. A State Party shall adopt rules and procedures to facilitate the recognition of nationality of persons who had the nationality of a predecessor State, during a transition period following State succession, based on the following principles: a. Every person who had the nationality of a predecessor State has the right to nationality of at least one of the successor States;