For US highways, yes, it's national, but as I said, not all
jurisdictions bother to enforce it. For example, some states
(Maryland) might only enforce it once...when the car is sold. If you
add lights later, they won't bother you usually. On my old VW Super
Beetle (1971) I mounted the foglights on top of the turn signals
(which were on top of the fenders). An unusual placement, but the
state troopers never bothered me about it. I made other modifications
to those lights, so they weren't foglights anymore. There were more
general illumination lights (helped make night time driveways seem
like day light work areas.) When folks were driving around with their
highbeams on, I'd flash them with my normal headlights. If that
didn't get them to turn off their highbeams I hit them with my
"fogs". I can't think of anytime that didn't work.

Off-road (BLM lands in the west for sure, and probably most National
Forests) those regulations don't apply.

On Dec 21, 2006, at 1:41 PM, Tom Buese wrote:

> I haven't had any inspection problems here in Utah, but is the 4
> light limit a national thing?