70 ILCS 2605/154

As of July 1, 1955, the corporate limits of the Sanitary District of Chicago are hereby extended so as to embrace and include within the same the territory and tracts of land situated in part in the Village of Franklin Park and situated in part in unincorporated areas all in the County of Cook and State of Illinois, hereinafter described as follows: All of Sections 19 and 20, Township 40 North, Range 12, East of the Third Principal Meridian, Cook County, Illinois, except those portions thereof which are now within the corporate limits of the Sanitary District of Chicago.