I read it as:
To fish for steelhead in the area defined by the map on pg35 of the regs, you need the rogue/south coast validation (along with a regular license and a combined angling tag). You could add a hatchery tag and use that for extra hatchery fish as well. Hatchery fish entered on either tag , but you need the combined tag to legally fish.
To harvest a wild steelhead in the designated area you need the rogue/south wild steelhead tag. This allows you 1 per day and three wild total for the year. Must be entered on this tag.
Elk and Sixes both appear to be in the designated area.
I've been in OR two years and reading the trout and salmon regs is still quite the chore. I check every time I go out just to make sure I have them straight and there's been no in season adjustments. Also carry a hard copy in my car. Sometimes the in season changes seem to conflict with parts of other regs which makes it tough. Just 10 days ago I ran into 2 guys leaving the Winchester crab docks with a limit each. Tried to about the closure, but one guy was adamant that the season opened Dec1 (ocean commercial season or ocean for uncontaminated areas I think). I told him I think he read that wrong and pointed out they were the only ones crabbing in what is a super popular spot all the time. Just gave me a whatever and left. Oh well, domoic acid brain damage for them I guess. The crabbing is apparently really good though, they were only out an hour for their limits. Amazing how many are around when nobody can harvest them.
I appreciate ODFW trying to tailor the regs to each and every waterbody, but geeze that makes for complicated regs.