(a) In this section, “department” means the Texas Department of Transportation.
(b) Use of the department’s facilities or property to serve a project aiding security in a ship channel security district created under this chapter serves a transportation purpose. A ship channel security district or a county whose commissioners court has created a ship channel security district may enter into an agreement with the department to provide for use of the department’s facilities or property to aid security in the district.

(c) A county that has entered into an agreement with the department for use of the department’s fiber optic network for transportation purposes may use the fiber optic network to serve a project aiding security in a ship channel security district created under this chapter in the same manner as other transportation purposes unless the agreement precludes the use of the fiber optic network for that purpose.