70 ILCS 200/255-120

The disconnection of any territory from the Springfield Metropolitan Exposition and Auditorium Authority shall not exempt it from taxation for the purpose of paying any indebtedness contracted by the corporate authorities of the Springfield Metropolitan Exposition and Auditorium Authority prior to the filing of the petition for disconnection. On the contrary, the territory shall be assessed and taxed to pay such indebtedness until this indebtedness is completely paid, the same as though the territory had not been disconnected. Except for this purpose, the county clerk of Sangamon County shall not include disconnected territory within the limits of the Springfield Metropolitan Exposition and Auditorium Authority from which the territory has been disconnected.