ODFW did a pretty decent job, of clearing up many reg's--and added many new ones too--this year. But yeah; the one in question here: is open for some debate / varying interpretations.
Your safest bet; would be to talk w/ a game warden or contact ODFW directly. And asking for the answer, in writing, would be additionally wise.
Spent many outings on that river, back in the day. You will enjoy it. And as soon as the river, gets back into shape--and sports the right color--GET ON IT! Good luck, and tight lines.
TD
P.S. Welcome to OFF.