Tex. Gov't Code § 844.004
(a) The standard retirement annuity payable under this subtitle is computed with an allowance for the possible payment of a benefit under Section 844.402 and is the actuarial equivalent of the sum of a member's:
Added by Acts 2007, 80th Leg., R.S., Ch. 873 (H.B. 1587), Sec. 30, eff. January 1, 2008.