(a) If the registered owner of the vehicle fails to comply with the terms of an agreement described by § 372.103, a toll project entity may send by first class mail to the person at the address shown on the agreement a written notice demanding payment of the outstanding balance due.
(b) If the registered owner fails to pay the outstanding balance due on or before the 30th day after the date on which the notice is mailed, the toll project entity may, in addition to other remedies available to the entity, refer the matter to an attorney authorized to represent the toll project entity for suit or collection.

(c) The authorized attorney may file suit in a district court in the county in which the toll project entity’s administrative offices are primarily located to recover the outstanding balance due. The authorized attorney may recover reasonable attorney’s fees, investigative costs, and court costs incurred on behalf of the toll project entity in the proceeding.