Texas Local Government Code - LOC GOV'T § 155.021. Deductions Enumerated

(1) for employee contributions for coverage under the federal social security program in accordance with Chapter 606,  1 Government Code;

(2) for the purchase of annuities or for contributions to investments for employees in accordance with Chapter 22, Acts of the 57th Legislature, 3rd Called Session, 1962 (Article 6228a-5, Vernon's Texas Civil Statutes);

(3) for the purchase of United States savings bonds for employees in accordance with Chapter 608, Government Code;

(4) for employee participation in a deferred compensation plan in accordance with Chapter 609,  2 Government Code; or

(5) for employee contributions to a retirement system in accordance with Section 845.403, Government Code.