U&A was defined by the Boldt Court and there are maps available. Some of the boundaries have changed due to Tribes going to court so the old maps I have may not be current. There aren't "salmon U&A" or "Crab U&A"; just the U&A and they fish inside that. They can also be invited to fish in other Tribe's U&A (has happened) when such an invitation makes management work better.

There was a PS Salmon management plan that was approved by the Court in the 70s. This was redone in the early 80s. I know there was an attempt to update steelhead plan in the early 90s but that fell apart, I think.

Don't what they use now because ESA blew it all up. For example, Nooksack-Samish was managed for hatchery Fall Chinook; the wild stock was blown away. When you return over 100K Chinook to the Bay, that kinda wipes out the by catch. Each and every stock in PS was designated as hatchery or wild and managed with the appropriate emphasis. ESA changed that so there likely is no operative "plan".