I saw this in my subscription email this morning. It is timely for some podcast research I have been doing.
I talked with some attorneys who are experts on treaty rights. They gave me another way to view it that I had not thought of previously. I'll try to paraphrase.
The treaties did not "grant" rights to the tribes from the US Government. Rather the tribes granted some rights (mostly property rights) to the US Government and retained/reserved other rights (rights to hunt and fish on these lands). The tribes already held these rights and the US government acknowledged those rights.
The list of rights the tribes were recognized as holding were the property rights, both surface and subsurface, the water rights, the timber rights, the (insert rights often associated with "the bundle of sticks" commonly used to explain property rights). Those acknowledged rights, governed by treaties and possibly sold/granted/reserved/retained also included hunting and fishing rights.
Thus, there were no rights being granted to tribes by treaties, rather some rights held by the tribes and acknowledged by the US Government were retained/reserved by the tribes. Even though land was sold/granted to the US Government, in the form of property rights, some existing rights were reserved, mostly hunting rights, and are still legally valid on those lands/property that was sold.
That gives a different lens through which to view this issue. Kind of like a landowner giving up certain rights in a sale or easement, say the mineral rights or the development rights or the access rights, yet they most often retain/reserve their other rights.
Not sure the comments of the attorneys have much to do with the legal frameworks that Wyoming is working on with tribes. But, it forces me to think about how the hunting and fishing rights, as stated in the treaties were rights that already existed and those rights were retained/reserved by the tribes in the treaties, even on lands for which they might have sold the surface and subsurface rights to as part of the treaty.
Sticky, complicated, and at times, contentious. And surely makes conservation more challenging (as if it weren't challenging enough).