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 a property interest in any goods except the rental property delivered by the lessor pursuant to the rental-purchase agreement;
(4) A wage assignment;
(5) A waiver by the consumer of claims or defenses; or
(6) A provision authorizing the lessor or a person acting on the lessor’s behalf to enter upon the consumer’s premises or to commit any breach of the peace in the repossession of rental property.