Tex. Gov't Code § 660.019
(a) Except as provided by Subsection (b), not later than the 45th day after the date a state employee submits a request for reimbursement of travel expenses, a state agency shall reimburse the state employee for reimbursable travel expenses incurred by the state employee if the state employee submits the request for reimbursement in accordance with:
Added by Acts 2007, 80th Leg., R.S., Ch. 551 (S.B. 1310), Sec. 1, eff. June 16, 2007.