55 ILCS 5/1-2003
The ballots used in the said elections may be in the following form, to wit: "For transferring territory," and "Against transferring territory." If a majority of the voters voting upon said question in the county from which said territory is proposed to be taken, and a majority of the voters of the county to which the same is proposed to be transferred, shall be "For transferring territory," then the said territory shall be transferred to and become a part of the county to which it is proposed to transfer the same, on and after the first day of March succeeding such elections, and shall be subject to all the laws, rules and regulations thereof: Provided, That all assessments and collection of taxes, and judicial or other official proceedings commenced prior to said first day of March, shall be continued, prosecuted and completed, in the same manner as if no such transfer had been made: And, provided, further, That all township or precinct officers within said transferred territory shall continue to hold their respective offices within the county to which they may be transferred, until their respective terms of office expire.
55 ILCS 5/1-2003