Tex. Government Code § 437.105: AUTHORITY TO MAKE DIFFERENTIAL PAYMENTS.

The department may pay an employee additional compensation for duty hours other than Monday through Friday normal business hours or for the ability to legally carry weapons if required for the position. The department shall adopt regulations to establish the classification, procedures, and amount of the additional compensation. The department may make differential payments only if money is available to pay those amounts.

Added by Acts 2013, 83rd Leg., R.S., Ch. 1217 (S.B. 1536), Sec. 1.01, eff. September 1, 2013.