Why would the Metis have so many rules regarding the Buffalo Hunt?

Thank you.

http://www.google.com/search?q=metis+buffalo+hunt+rules&ie=utf-8&oe=utf-8&aq=t&client=firefox-a&rlz=1R1GGGL_en___US321

I imagine their rules are meant to keep people in line (so they don't kill other people by mistake) and to make sure the herds weren't/aren't depleted. Overhunting in one year could lead to famine in future years.