Any territory lying adjacent and contiguous to a mosquito abatement district, and not part of another mosquito abatement district, may be annexed to such district in the following manner:
The ordinance authorizing the annexation shall be published within 10 days after the ordinance has been adopted, in one or more newspapers having a general circulation within the territory. The publication of the ordinance shall be accompanied by a notice of (1) the specific number of voters required to sign a petition requesting the question of annexation; (2) the time within which the petition must be filed; and (3) the date of the prospective referendum. The county clerk of the county in which the territory is situated shall provide a petition form to any individual requesting one.
The ordinance shall take effect 30 days after the date of publication unless a referendum is requested prior to the effective date of the ordinance by 10% or more of the registered voters in the territory. The question of the annexation of the territory may be submitted to the legal voters of the territory at a regular election by certifying the question to the proper election officials. Notice of the election shall be given and the election conducted in the manner provided by the general election law. The proposition shall be stated, "Shall the territory (describing it) be annexed to The.... Mosquito Abatement District?" If the majority of all the votes cast on the question is in favor of the annexation, the territory shall be deemed annexed to and shall be a part of the mosquito abatement district.
No territory may be annexed under this subsection (i) more than one year after it has first been included in that city or village unless the territory so annexed is 50 acres or less or (ii) if the annexation would expand the mosquito abatement district's boundaries outside of a county unless the district already contains territory in that county.
70 ILCS 1005/10