Although flossing is technically still legal at this point, FOC (dfo) advises that,
"While fishing for chinook and chum salmon, anglers are advised to avoid using
fishing methods such as bottom bouncing that catch sockeye salmon and use other
fishing methods that are selective."
So although legal, is it up to the angler to chose whether he/she feels it is still ethical to go against FOC's advise and continue to floss.
Keep in mind, people's decisions to continue to floss after this advisory in the past has led to spot closures on the Fraser.
Hopefully people make the right choice...