I've also heard that it is illegal to have a tow hitch on the truck when not towing, and it makes sense to me, if someone rear-ends you, they will get speared and suffer way more damage, and neither vehicle's bumper will be able to do the job it was intended to do.
That said, I've never heard of anyone getting a ticket or even a warning about this. Nor have I ever heard of anyone successfully confirming this in the actual legislation.
In short, I have no idea.
2009 White Tacoma Dbl Cab LB TRD Sport
AllPro front bumper w/ Warn 8500 winch, AllPro IFS skid, 4xInnovations sliders, CBI rear bumper
Icon ext. travel coilovers w/ Camburg UCAs, AllPro exped leaf pack w/ Fox 2.0 RR shocks, AllPro U-bolt flip kit, ext. braided steel brake lines
Weathertech floormats, Wet Okole seat covers, Viair OBA, Canopy
Summer - ATX Mojave Teflon w/ Mickey Thompson Baja Claws (33x12.5)
Winter - OEM 16inch Alloys painted black w/ Nokian Hakka LT Studded (265/75/r16)