Tex. Gov't Code § 814.101 – Application for Service Retirement Benefits

(a) A member may apply for a service retirement annuity by filing an application for retirement with the board of trustees.
(b) An application for a service retirement annuity may not be made:
1. (1) after the date the member wishes to retire; or
2. (2) more than 90 days before the date the member wishes to retire.

Acts 1981, 67th Leg., p. 1876, ch. 453, Sec. 1, eff. Sept. 1, 1981. Renumbered from Vernon's Ann.Civ.St. Title 110B, Sec. 24.101 by Acts 1989, 71st Leg., ch. 179, Sec. 1, eff. Sept. 1, 1989.