Panning Regulations:

Michigan –> Source page

Wisconsin

Illinois

Minnesota’s regulations can be found here.

North Dakota – No public regulations available.  There has been so little interest in modern times that the state does not appear to have any regulations regarding what equipment can be used.

Gold Locations:

https://www.midwestprospector.com/statelocation.html

https://www.dmr.nd.gov/ndgs/ndnotes/Gold/Gold.asp

https://www.michgpaa.com/GoldFindsLocations.html