(a) Each participating subdivision, by order or resolution of its governing body, shall designate the rate of member contributions for its employees. The subdivision may elect a rate of four, five, six, or seven percent of the current service compensation of its employees.
(b) After timely notice to the board of trustees, the governing body of a participating subdivision may increase the rate of its member contributions effective with the first pay period beginning in the following calendar year.

(c) After timely notice to the board of trustees, the governing body of a participating subdivision may reduce the rate of its member contributions effective with the first pay period beginning in the following calendar year.
(d) to (f) Repealed by Acts 1997, 75th Leg., ch. 309, Sec. 33, eff. Dec. 31, 1997.