Texas Constitution art. 11 §11

(a) A Home Rule City may provide by charter or charter amendment, and a city, town or village operating under the general laws may provide by majority vote of the qualified voters voting at an election called for that purpose, for a longer term of office than two (2) years for its officers, either elective or appointive, or both, but not to exceed four (4) years; provided, however, that tenure under Civil Service shall not be affected hereby; provided, however, that such officers, elective or appointive, are subject to Section 65 (b), Article XVI, of this constitution, providing for automatic resignation in certain circumstances, in the same manner as a county or district officer to which that section applies. (b) A municipality so providing a term exceeding two (2) years but not exceeding four (4) years for any of its non-civil service officers must elect all of the members of its governing body by majority vote of the qualified voters in such municipality. (c) Any vacancy or vacancies occurring on such governing body shall not be filled by appointment but must be filled by majority vote of the qualified voters at a special election called for such purpose within one hundred and twenty (120) days after such vacancy or vacancies occur except that the municipality may provide by charter or charter amendment the procedure for filling a vacancy occurring on its governing body for an unexpired term of 12 months or less. (Added Nov. 4, 1958; amended Nov. 6, 2001; Subsec. (b) amended and (c) added Nov. 5, 2013.) (TEMPORARY TRANSITION PROVISION for Sec. 11: See Appendix, Note 3.)