I'm not sure. I don't see anything in the regs about it. I thought I remember hearing something about restrictions on the lake.
To be honest, I've only lived in the area for a year. And last winter the ice didn't form on the lake. Every time I hit the spud, it went thru in one or two hits, all year.. The lake is full of natural springs, and has very inconsistent ice.
On that note...If you plan on going out, let me know