Just browsing this forum so I'm not really qualified to answer, but wouldn't the arguement be that a track bike by it's nature isn't meant to be used in street conditions? I mean like you see car parts that aren't for sale or use on street legal vehicles, they are intended for race use, and as such are illegal on the street. Knd of like no turn signals on a race car thing, know what I mean?

In any case, Virginia law says:

"Bicycles ridden on highways must have brakes which will skid the wheels on dry, level, clean pavement."

For clarification: "A highway is defined as the entire width between the boundary lines of every place open to public use for purposes of vehicular travel."