Amendment of this Constitution
Amendments touching supremacy, territory, people's sovereignty, key national values, the Bill of Rights, the President's term, independence of the Judiciary and commissions, Parliament's functions, devolution or the amendment rules need a referendum: 20% turnout in half the counties and a simple majority.
The official text
(1) A proposed amendment to this Constitution shall be enacted in accordance with Article 256 or 257, and approved in accordance with clause (2) by a referendum, if the amendment relates to any of the following matters—
(a) the supremacy of this Constitution;
(b) the territory of Kenya;
(c) the sovereignty of the people;
(d) the national values and principles of governance referred to in Article 10(2)(a) to (d);
(e) the Bill of Rights;
(f) the term of office of the President;
(g) the independence of the Judiciary and the commissions and independent offices to which Chapter Fifteen applies;
(h) the functions of Parliament;
(i) the objects, principles and structure of devolved government; or
(j) the provisions of this Chapter.
(2) A proposed amendment shall be approved by a referendum under clause (1) if—
(a) at least twenty per cent of the registered voters in each of at least half of the counties vote in the referendum; and
(b) the amendment is supported by a simple majority of the citizens voting in the referendum.
(3) An amendment to this Constitution that does not relate to a matter specified in clause (1) shall be enacted either—
(a) by Parliament, in accordance with Article 256; or
(b) by the people and Parliament, in accordance with Article 257.
Summaries and answers are a plain-English guide written by Iam254, not legal advice. The official text is what counts. Official text: Constitution of Kenya, 2010, Kenya Law (National Council for Law Reporting), legislation as at 3 September 2010. It has not been amended since.