If the authority receives revenue in excess of that required for the purposes specified by Sections 8512.0405(b)(1), (2), (3), and (5), the board may:
(1) use the excess revenue to:
(A) establish a reasonable depreciation and emergency fund; or
(B) retire bonds issued under this chapter by purchase and cancellation or redemption; or
(2) apply the excess revenue to any corporate purpose.