The best thing I can think of is similar to AuntyM and just limit the means the tribes can use to harvest and what the resource can be used for. If the tribes want to force the issue of the treaty, we should put it into context of the time period that treaty was signed. Tell them they can only harvest fish for sustenance. I doubt the tribes would be able to prove they sold salmon roe to Japan before the white man came over. Force them to use the equipment of the time. Reed nets and so on. After all, that's what was in use when the treaty was signed. That's the legacy they claim they want to hang on to. Or, let them fish just like sportsmen, only let them fish whenever they want and keep as much as they want. Sure, they'll do more damage than sportsmen, but far less than they do now. If they want to fish commercially, they have to get a commercial liscense just like anyone else because they do not have a historical tradition of selling fish to Safeway.