Rockford Life Insurance v. Illinois Department of Revenue

This case involves financial instruments commonly known as “Ginnie Maes.” These instruments are issued by private financial institutions, which are obliged to make timely payment of the principal and interest as set forth in the certificates. The Government National Mortgage Association (GNMA) guarantees that the payments will be made as scheduled. The question presented today is whether these instruments are exempt from state taxation under the constitutional principle of intergovernmental tax immunity, or under the relevant immunity statute.

Prior to 1979 changes in Illinois’ tax law,…