Tex. Gov't Code § 854.101
Current with legislation from the 2023 Regular and Special Sessions signed by the Governor as of November 21, 2023.
A member may apply for service retirement by filing a retirement application with the board of trustees not later than the date specified by the member for retirement or, if the member has not previously selected an optional service retirement annuity under Section 854.105, not earlier than the 90th day before that date.
Tex. Gov't. Code § 854.101