A consumer contract clause is void if it deems a consumer's nonfeasance to manifest an intention to be bound by the offer of a consumer contract or by the acceptance of such an offer, or if it otherwise restricts a consumer's rights or expands a consumer's obligations as compared to when legal or regulatory provisions unrelated to public order are applied, unilaterally prejudicing the interests of the consumer in violation of the fundamental principle provided in Article 1, paragraph (2) of the Civil Code.