As part of the contract or prior to the execution of a contract for the sale of any real property which is subject to a special assessment or fee pursuant to Kan. Stat. Ann. § 12-6a01 et seq., and amendments thereto, the seller of the property shall disclose to the buyer that the property is subject to such special assessment or fee or located in an improvement district created pursuant to Kan. Stat. Ann. § 12-6a01 et seq., and amendments thereto. If the amount of such special assessment or fee is unknown, the seller shall make a good faith estimation of such amount. The seller of the property shall obtain a written acknowledgment from the buyer that the buyer is aware of such assessment or fee or that the property is located in an improvement district created pursuant to Kan. Stat. Ann. § 12-6a01 et seq., and amendments thereto.