The commissioners court of a county by the resolution or order providing for the issuance of bonds under this chapter or by the trust indenture securing those bonds may provide that the toll bridge be operated by an operating board if the court determines that the bridge could be better and more efficiently operated by the board. The operating board:
(1) is appointed as provided by the resolution, order, or trust indenture; and
(2) has the powers granted by the resolution, order, or trust indenture but may not be granted the power of eminent domain or the power to borrow money.