There is created a Southeastern Wisconsin Fox River Commission for the Illinois Fox River basin. For the purposes of this subchapter, the Illinois Fox River basin extends from the northern boundary of the city of Waukesha downstream to the Wisconsin-Illinois border, except that the commission may extend this area by an affirmative vote of the majority of voting commissioners. The board of commissioners shall govern the commission. A county or river municipality may appropriate money to the commission. The commission, a river county or a river municipality may solicit gifts, grants, and other aid for the commission to enable the commission to perform the functions in this subchapter.