Wis. Admin. Code Department of Natural Resources NR 22.07
Buildings, vehicles, tents, fish shanties or similar enclosures may be used on the ice for fishing purposes on the Mississippi river from the time the ice forms; provided, however, that all such enclosures or shelters shall be removed from the ice on or before February 20 of each year unless otherwise extended by the department. The door of any enclosure or shelter shall be equipped with a latch which will permit the door to be readily opened from the outside at all times while the enclosure or shelter is occupied. The name and residential address of the person owning such enclosure or shelter shall be painted or permanently affixed in the English language on the outside of the structure with lettering a minimum of one inch square. Residents of Wisconsin or Iowa angling from a fish shelter shall comply with the law of their respective states relative to licensing and identification of fish shelters. Residents of states other than Wisconsin or Iowa who hold a nonresident fishing license from either state must comply with the law of the issuing state relative to the licensing and identification of fish shelters.
Wis. Admin. Code Department of Natural Resources NR 22.07