There are laws in place, ESA, CITES, etc. that could be used. But, NOAA has said that fishing is not the problem for Killer Whales.

But, if we could get Greenpeace and Sea Shepherd on the water to protect the Killer Whales, it might work.

NOAA tied itself in knots to protect Alaska. That is why some of the stocks have a recovery based on all harvest while others have recovery based on fisheries after leaving BC and AK.

Since the intercepting fisheries are somewhat capped, managers down here could shut things down to provide for the whales. Could still catch the fish, just after they became inaccessible (freshwater) to the whales. We could take some action on pinnipeds.

Any action, that actually has a real chance of working, is going to massively inconvenience somebody who votes and buys politicians. If dead whales start floating up on beaches regularly, then maybe something will be done. But, my money is on the idea that we need to fix all the habitat, quiet down the water, keep non-Indians away from the whales and all will be fine. That way, no major donor is harmed.