Each nation has its own agreement with the USA that defines these things, it’s weird. I think it’s in Wisconsin where tribe members retain hunting and fishing rights to a lake sold as a private lake, when cops showed up, they had to let them fish and hunt or the land would be returned to the tribe. As per the agreement from long ago.
I always thought it was open and then women. Open for any to join then a women’s team if there were enough women playing the sport. My highschool had a girl play on the football team, I think it was because we didn’t have a girls football team but w/e.