You are mixing up your properties. Closure of an operator on a set means that if you take any two elements of the set and apply the operator to them, the result is also in the set.Disclosure report requirements. A seller of residential real property shall complete all items in the disclosure report described in Section 35. When you decide to close your business, you must contact the Illinois Department of Revenue regarding your tax liabilities. Contact can be made. The amendment shall contain legal descriptions sufficient to indicate the location of any property involved in the transaction. When selling a home in Illinois, you must make certain disclosures to prospective buyers regarding its physical condition, and that of the entire property. When selling a home in Illinois, you must make certain disclosures to prospective buyers regarding its physical condition, and that of the entire property. If you are planning to close any city streets or parking lots for your event, please complete the Street or Parking Lot Closure Permit Application.