Sec. 4. (a) Except as provided in subsection (b), IC 36-1-14.3 (before its repeal) concerning public-private agreements does not apply to a contract, a lease, an agreement, or an extension of a contract, a lease, or an agreement entered into before May 10, 1995.
(b) This subsection applies to an agreement in the nature of a public-private agreement (as defined in IC 36-1-14.3-4 (before its repeal)) that was entered into or extended before May 10, 1995. The parties to an agreement described in this section may enter into an addendum of the agreement to be governed by IC 36-1-14.3 (before its repeal) and to apply the provisions of IC 36-1-14.3 (before its repeal) to the agreement. If the parties enter into an addendum under this section, the addendum becomes a part of the agreement to the same extent as if the addendum had been part of the original agreement.