When the proposition voted upon is to erect a single town or road district into a public health district, such proposition shall be carried if a majority of those voting upon the proposition shall vote "yes".
When the proposition voted upon is to erect two or more adjacent towns or road districts into a health district, such proposition shall be carried if the majority of those voting upon the proposition in each town or road district shall vote "yes."
When the proposition voted on is whether a town or road district shall become a part of an existing public health district, such proposition shall be carried if a majority of those voting on the proposition shall vote "yes".
70 ILCS 905/7