Constitution of Kenya
15. Citizenship by registration
(1) A person who has been married to a citizen for a period of at least seven years is entitled on application to be registered as a citizen.
(2) A person who has been lawfully resident in Kenya for a continuous period of at least seven years, and who satisfies the conditions prescribed by an Act of Parliament, may apply to be registered as a citizen.
(3) A child who is not a citizen, but is adopted by a citizen, is entitled on application to be registered as a citizen.
(4) Parliament shall enact legislation establishing conditions on which citizenship may be granted to individuals who are citizens of other countries.
(5) This Article applies to a person as from the effective date, but any requirements that must be satisfied before the person is entitled to be registered as a citizen shall be regarded as having been satisfied irrespective of whether the person satisfied them before or after the effective date, or partially before, and partially after, the effective date.