Tenure of office of President
Section 135(1) · 1999 Constitution (2004 edition)
What Constitution says
(1) Subject to the provisions of this Constitution, a person shall hold the office of President until - (a) when his successor in office takes the oath of that office; (b) he dies whilst holding such office; or (c) the date when his resignation from office takes effect; or (d) he otherwise ceases to hold office in accordance with the provisions of this Constitution.
This is the 1999 Constitution as published in 2004. Later amendments aren't included yet, so a section may have changed since.
Original source
Official Gazette · CFRN 1999 official PDF · printed page 69. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections