(a) In addition to the purposes authorized by this chapter, the revenue from a tax imposed under this chapter by a county authorized to impose the tax under § 352.002(a)(4) may be used to make repairs and improvements to the county airport or to provide reimbursement for repairs and improvements to the airport.
(b) A county to which this section applies may not use revenue from a tax imposed under this chapter for a purpose described by Subsection (a) in a total amount that would exceed the amount of hotel revenue in the county that is likely to be reasonably attributable to guests traveling through the airport during the 15-year period beginning on the date the county first uses the tax revenue for that purpose.

(c) A county to which this section applies may not use revenue from a tax imposed under this chapter for a purpose described by Subsection (a) after the 10th anniversary of the date the county first uses the revenue for that purpose.