Cletis, stop by a copshop and ask them to refer you to the specific code that states you cannot use them. Once you get the law and code on paper keep a copy of it in the truck so you can show the officer in question. If he still insists on being right tell him plainly to give you the ticket so you can subpeona him to court so that he can explain to the judge why hes wasting the courts time.
Just my opinion, but its worked numerous times. I have a great respect for our officers, well most of them, but it's really surprising how many of them don't know the specific laws they try to enforce.
In WA they would probably pull you over, but so long as you can see them for the required distance there shouldn't be a problem. So many folks up here use those damned black covers with cutouts which probably block half the actual light.
In another instance, our law requires certain things like wipers, rear view mirrors, etc. The law does not state they need to be installed on the vehicle. It's been a few years since I've looked over the RCW's but that kind of situation was abundant last I looked.
Hope that helps.
Jeff
Last edited by cletis; 03/06/2013 11:07 AM. Reason: language