In the case of a nonelectronic consumer contract or agreement, the contract or agreement may not contain a provision authorizing the conducting of the transaction or any part thereof by electronic means unless the consumer agrees to such a provision by a separate and express acknowledgment. Such an agreement shall specifically indicate the parts of the transaction to be conducted by electronic means and shall indicate the manner in which the electronic transaction or a part thereof shall be conducted. An agreement to conduct a consumer transaction or a part thereof electronically may not be inferred solely from the fact that the consumer has used electronic means to pay an account or register a purchase or warranty.