North region ponds are all closed to ice fishing as a default, but many of them are open through special regulations. Like Alex said, you have to look up the individual body of water to see if it’s open and to see what other special regulations are in place. For instance:
FLAGSTAFF LAKE, Bigelow Twp, Dead River Twp, Flagstaff Twp, etc. (North Region). General fishing laws apply, except: A. Open to open water fishing from October 1 - November 30 and open to ice fishing in November: S-7.
Exception “A” and “S-7” you have to look up in the front of the law book.
A: Open to ice fishing and open water fishing for all fish from December 1 - April 30
S-7: All trout, landlocked salmon, and togue caught must be released alive at once.
Kind of a pain in the butt, but you’ll get the hang of it.