Where would I look to find requirements for a wilderness commercial guiding liscence in montana?

I am thinking about opening up a small guide service operating in the remote wilderness areas in Montana. I will not be fishing or hunting but guiding people on backpacking trips.Where would I look to find requirements for a wilderness commercial guiding liscence in montana?
http://homebizseo.com/50states/Montana.h鈥?/a> Montana Business License Department