Wisconsin Constitution Art. IV § 31. Special and private laws prohibited

(1) For changing the names of persons, constituting one person the heir at law of another or granting any divorce.

(2) For laying out, opening or altering highways, except in cases of state roads extending into more than one county, and military roads to aid in the construction of which lands may be granted by congress.

(3) For authorizing persons to keep ferries across streams at points wholly within this state.

(4) For authorizing the sale or mortgage of real or personal property of minors or others under disability.

(5) For locating or changing any county seat.

(6) For assessment or collection of taxes or for extending the time for the collection thereof.

(7) For granting corporate powers or privileges, except to cities.

(8) For authorizing the apportionment of any part of the school fund.

(9) For incorporating any city, town or village, or to amend the charter thereof.