A rental-purchase agreement may not contain:
(1) a confession of judgment;
(2) a negotiable instrument;
(3) a security interest or any other claim of property interest in any property except the property delivered by the lessor pursuant to the rental-purchase agreement;
(4) a wage assignment;
(5) a waiver of claims or defenses by the consumer; and
(6) a provision authorizing the lessor or any person acting on the lessor's behalf to enter the consumer's premises or to commit any breach of the peace in the repossession of property.