A park district may be dissolved in the following manner:
Whenever legal voters in the district, equal to two-thirds of the vote cast at the last preceding park district election for the commissioner who received the greatest number of votes, but not less than 20% of the legal voters of the district, petition the board of the park district for submission of the question whether the park district will dissolve its incorporation, the board shall (1) certify that question to the proper election officials for submission to the legal voters of the district, (2) designate the election at which the question is to be submitted, and (3) give notice of the referendum as required by the general election law.
70 ILCS 1205/13-1