Except for all those Fall Chinook taken as black mouth and in ocean fisheries. It id 50:50 for all harvestable in WA waters, not 50:50 in each location.

If a springer program was established, the NI would have the opportunity for 50% of them. Unless WDFW decides to give some away. But, given that (at least back in the 80s) PS springers get taken in the marine waters it is quite probable that the only fishery in the river would be tribal.