Tex. Gov't Code § 815.321
(a) When a member dies who selected or was eligible to select a death benefit plan, or whose beneficiary is eligible to receive an annuity under Section 814.302(b) or 814.304, the retirement system shall transfer:
Acts 1981, 67th Leg., p. 1876, ch. 453, Sec. 1, eff. Sept. 1, 1981.
Amended by Acts 1985, 69th Leg., ch. 91, Sec. 16, eff. Sept. 1, 1985. Renumbered from Vernon's Ann.Civ.St. Title 110B, Sec. 25.317 and amended by Acts 1989, 71st Leg., ch. 179, Sec. 1, eff. Sept. 1, 1989.