Constitution of Kenya, 2010 (i) necessary for the well-being of the members and staff of Parliament; or (ii) prescribed by national legislation. Clerks and staff of Parliament. 128. (1) There shall be a Clerk for each House of Parliament, appointed by the Parliamentary Service Commission with the approval of the relevant House. (2) The offices of the Clerks and offices of members of the staff of the Clerks shall be offices in the Parliamentary Service. CHAPTER NINE—THE EXECUTIVE PART 1—PRINCIPLES AND STRUCTURE OF THE NATIONAL EXECUTIVE Principles of executive authority. 129. (1) Executive authority derives from the people of Kenya and shall be exercised in accordance with this Constitution. (2) Executive authority shall be exercised in a manner compatible with the principle of service to the people of Kenya, and for their wellbeing and benefit. The National Executive. 130. (1) The national executive of the Republic comprises the President, the Deputy President and the rest of the Cabinet. (2) The composition of the national executive shall reflect the regional and ethnic diversity of the people of Kenya. PART 2—THE PRESIDENT AND DEPUTY PRESIDENT Authority of the President. 131. (1) The President— (a) is the Head of State and Government; (b) exercises the executive authority of the Republic, with the assistance of the Deputy President and Cabinet Secretaries; (c) is the Commander-in-Chief of the Kenya Defence Forces; (d) is the chairperson of the National Security Council; and (e) is a symbol of national unity. 75