Yes they are. Snoop around on the State of Washington site & you'll find all kinds of little laws about bumpers, fenders, etc and you can't have extrusions beyond such and such etc.... If I find a link, I'll edit it into this post. But it's hardly enforced. Just drive safe and sane with mudflaps and cops won't give you a problem. And I can't find it, but there was somewhere a law that said your fender flairs cannot excede 2 or 3 inches.
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There's another subsection which also talks about other stuff, see if I can find it also. And YEAH, I know it's lame, but tell it to the judge, 'cause I don't care.
Also notice that the DOORS are required to be on the rig as per the original manufacturer. That means NO door mods or removal. If it came with doors, it needs to still have them.