In this chapter:
(1) "Bondholder" includes a trustee for a bondholder.
(2) "Bond instrument" means a bond resolution or trust indenture.
(3) "Interim bond" means a temporary bond, with or without coupons, that may be converted to a definitive bond.
(4) "Project" means a causeway, bridge, or tunnel, including a necessary approach, fixture, accessory, or equipment that:
(A) is located in one county; and
(B) traverses or lies under the water of the Gulf of Mexico, including a bay or inlet opening.