I was thinking of tinting my tail lights, but I'd like to know if its legal in Oregon before I go to the trouble.

I've scoured the ODOT website and have only found laws relating to tail light covers and not relating to tinting. I know I've seen people driving around with the tinted tails, but I also don't know how often they get pulled over for it :P

So does anyone know what Oregon law is relating to tail light tinting?