Tex. Government Code § 823.201: CURRENT MEMBERSHIP SERVICE.

(a) Membership service is credited in the retirement system for each year in which a member is an employee and for which the member renders sufficient service for credit under Section 823.002 and makes and maintains with the retirement system the deposits required by this subtitle or prior law.

(b) The board of trustees may adopt rules for the granting of membership service credit.

Acts 1981, 67th Leg., p. 1876, ch. 453, Sec. 1, eff. Sept. 1, 1981. Amended by Acts 1981, 67th Leg., 1st C.S., p. 202, ch. 18, Sec. 21, eff. Nov. 10, 1981. Renumbered from Vernon's Ann.Civ.St. Title 110B, Sec. 33.201 and amended by Acts 1989, 71st Leg., ch. 179, Sec. 1, eff. Sept. 1, 1989.