Wis. Stat. § 229.45: Powers granted to sponsoring municipality.

In addition to any powers that it may otherwise have, a sponsoring municipality may do any of the following:

(1) Make grants or loans to a district upon terms that the sponsoring municipality considers appropriate.

(2) Expend public funds to subsidize a district.

(3) Borrow money under ss. 67.04 and 67.12 (12) for exposition center facilities or to fund grants, loans or subsidies to a district.