9. (1) A person shall cease to be a citizen of Zambia if that person- (a) acquires the citizenship of a country other than Zambia by a voluntary act, other than marriage; and (b) does any act indicating that person's intention to adopt or make use of any other citizenship. Cesser of citizenship (2) A person who(a) becomes a citizen of Zambia by registration; and (b) immediately after becoming a citizen of Zambia, is also a citizen of some other country; shall, subject to clause (4), cease to be a citizen of Zambia at the expiration of three months after such person becomes a citizen of Zambia unless such person has renounced the citizenship of that other country, taken oath of allegiance and made and registered such declaration of his intention concerning residence as may be prescribed by or under an Act of Parliament. (3) For the purpose of this Article, where, under the law of a country other than Zambia, a person cannot renounce the citizenship of that other country that person need not make such renunciation but may instead be required to make such declaration concerning that citizenship as may be prescribed by or under an Act of Parliament. (4) Provision may be made by or under an Act of Parliament for extending the period within which any person may make a renunciation of citizenship, take oath or make or register a declaration for the purpose of this Article, and if such provision is made that person shall cease to be a citizen of Zambia only if at the expiration of the extended period that person has not then made the renunciation, taken the oath or made or registered the declaration, as the case may be. 10. (1) For the purpose of this Part, a person born aboard a registered ship or aircraft, or aboard an unregistered ship or aircraft of the Government of any country, shall be deemed to have been born in the Interpretation