Texas Natural Resources Code - NAT RES § 111.187. Reimbursement of Excess Charges

If a rate is filed by a common carrier and complaint against the rate or petition to reduce the rate is filed by a shipper, and the complaint is sustained in whole or part, all shippers who have paid the rates filed by the common carrier are entitled to reparation or reimbursement of all excess transportation charges paid over and above the proper rate as finally determined on all shipments made after the date of the filing of the complaint.