Sec. 27. (a) Except as provided in subsection (b), and notwithstanding any other provision of this chapter, funds generated by tolls or any other means from a toll road project that was in existence and in use on or before January 1, 1986, shall be used exclusively for purposes that are authorized and described in this chapter.
(b) If the authority enters into a public-private agreement with respect to a toll road project under IC 8-15.5, funds generated by tolls or any other means from that project shall be used as provided in IC 8-15.5.