After the effective date of this Act, any installment contract for the sale of a dwelling structure shall be voidable at the election of the buyer unless there is attached to the contract or incorporated therein a certificate of compliance, or in the absence of such a certificate (i) an express written warranty that no notice from any city, village or other governmental authority of a dwelling Code violation which existed in the dwelling structure before the installment contract was executed had been received by the contract seller, his principal or his agent within 10 years of the date of execution of the installment contract, or, (ii) if any such notice of violation had been received, a list of all such notices so received with a detailed statement of all violations referred to in such notice. The requirements of this section cannot be waived by the buyer or seller.