Prior to the effective date of this amendatory Act of the 102nd General Assembly, the Fourth Judicial District consists of the counties of Adams, Pike, Calhoun, Schuyler, Brown, Cass, Mason, Menard, Morgan, Scott, Greene, Jersey, Macoupin, Sangamon, Logan, McLean, Woodford, Livingston, Ford, DeWitt, Macon, Piatt, Moultrie, Champaign, Douglas, Vermilion, Edgar, Coles, Cumberland and Clark.