From the MN DNR Website at: Shelters Placed on the Ice Must Have Proper Identification
Fish houses, dark houses and portable shelters placed on the ice must have proper identification (2005-01-04)
It’s a sign of the season, fish houses, dark houses and portable shelters dotting Minnesota waters as anxious anglers ready for another ice fishing season.
“Ice fishing is among the most popular Minnesota winter activities, with about 140,000 ice fishing shelter licenses sold last year,” said DNR Chief Conservation Officer Mike Hamm, “but with this opportunity comes some responsibility.”
Hamm said all shelters, which include dark houses, fish houses and portable shelters, placed on the ice of Minnesota waters must have the complete name and address, driver’s license number or MDNR number that’s issued to the individual through the Electronic Licensing System(ELS) system plainly and legibly displayed in readily visible locations on the outside in letters and figures at least 2 inches in height.
Dark houses, fish houses and portable shelters placed on the ice for shelter while fishing must be licensed, except that a license is not required on border waters with Wisconsin, Iowa and South Dakota. The tag, furnished with the license, must be attached to the exterior in a readily visible location.
Hamm also urged snowmobilers and ATV riders to be aware of fish houses partially or completely hidden by snow. “Night riders should be very alert and slow down, you may hit one of these before you ever see it. So drive at a speed which will allow you time to see potential hazards and avoid them,” Hamm said.
The following regulations apply to fish houses, dark houses, and portable shelters used on all Minnesota waters, unless noted in the 2004 Minnesota Fishing Regulations Handbook.
– Dark houses, fish houses, and portable shelters must have a door that can be opened from the outside at any time when in use.
– No person may erect a dark house, fish house, or shelter within 10 feet of an existing dark house, fish house, or shelter.
– Fish houses left on the ice overnight need to have at least 2 square inches of reflective material on each side of the house.
– Portable dark houses, fish houses, and shelters may be used for fishing within the Boundary Waters Canoe Area Wilderness (BWCAW), but must be removed from the ice each night. The structure must be removed from the BWCAW each time the occupant leaves the BWCAW.
Had a buddy from WI go to Winnie and he has a van fixed up that has holes in the floor with sleeves that he runs down to the ice. He checked with DNR and they said he needed to license it. He was checked by the CO while up there and complimented on both the design and having it licensed. 
.
)…so please be specific.
