(2) The following persons shall, upon application, be registered as citizens of Uganda— (a) every person married to a Uganda citizen upon proof of a legal and subsisting marriage of three years or such other period prescribed by Parliament; (b) every person who has legally and voluntarily migrated to and has been living in Uganda for at least ten years or such other period prescribed by Parliament; (c) every person who, on the commencement of this Constitution, has lived in Uganda for at least twenty years. (3) Clause (2)(a) of this article applies also to a person who was married to a citizen of Uganda who, but for his or her death, would have continued to be a citizen of Uganda under this Constitution. (4) Where a person has been registered as a citizen of Uganda under clause (2)(a) of this article and the marriage by virtue of which that person was registered is— (a) annulled or otherwise declared void by a court or tribunal of competent jurisdiction; or (b) dissolved, that person shall, unless he or she renounces that citizenship, continue to be a citizen of Uganda. 13. Citizenship by naturalisation. Parliament shall by law provide for the acquisition and loss of citizenship by naturalisation. 14. Loss of citizenship by registration. A person may be deprived of his or her citizenship if acquired by registration, on any of the following grounds— (a) voluntary acquisition of the citizenship of another country; (b) voluntary service in the armed forces or security forces of a country hostile to or at war with Uganda; (c) acquisition of Uganda citizenship by fraud, deceit, bribery, or having made intentional and deliberate false statements in his or her application for citizenship; and (d) espionage against Uganda.