150.9.1. No long-term contract of lease may contain a stipulation whereby the merchant may claim(a) charges on the ground that the nature or quality of a part or component installed as part of the normal maintenance service does not satisfy the merchant, unless the contract expressly provides that the goods may only be returned with a component of a specific nature or quality; or
(b) charges on the ground that the part is not an original part from the manufacturer or that the maintenance service was not performed by the manufacturer or a merchant approved by the manufacturer.