65 ILCS 5/11-17-9
When the board of directors of any public health board established and maintained under this Division 17 makes a written recommendation to the corporate authorities for the discontinuance of the public health board, stating in their recommendation the reasons therefor, or when at least 20% of the electors of the municipality, as shown by the last general municipal election, present a petition to the corporate authorities asking for the discontinuance of the public health board, the corporate authorities may pass an ordinance providing for the discontinuance of the board.
This ordinance shall be certified by the local clerk and submitted to the electors of the municipality at an election in accordance with the general election law. The ordinance shall be effective only if approved by a majority of those voting upon the question.
The methods of discontinuance provided by this section and Section 11-17-10 are exclusive.
65 ILCS 5/11-17-9