Ind. Code § 24-5-16.5-4

Sec. 4. As used in this chapter, "lease agreement" means a written agreement entered into in Indiana for the transfer from a retail lessor to a retail lessee of the right to possess and use a motor vehicle in exchange for consideration for a scheduled term exceeding four (4) months, whether or not the retail lessee has the option to purchase or otherwise become the owner of the motor vehicle upon expiration of the agreement. The term does not include an agreement that covers an absolute sale, a sale pending approval, or a retail installment sale.