(a) A county may lease, rent, or donate to the United States property or a building, structure, or other facility acquired, constructed, improved, enlarged, or equipped in whole or in part with proceeds from the sale of bonds issued by a county under this chapter.
(b) The acquisition, construction, improvement, enlargement, or equipment by a county of property or a building, structure, or other facility for lease to and the donation of property or a building, structure, or other facility by a county to the United States for use in performing a federal governmental function in the county or at or near and relating to a toll bridge of the county is a public purpose and proper county function, regardless of whether the toll bridge or the federal facility relating to the toll bridge is located inside or outside the county.