School Zones.
"what's to keep a local school board from prohibiting carry within a mile of school property... This is what happens when you let a committee modify a bill on the fly."
Granted, while a literal open carry argument may not hold up under scrutiny of law pertaining to a school zone, the law is absolutely clear regarding legally owned weapons while on school property. The Supreme Court voted the original Gun Free School Zone Act of 1990 unconstitutional and it was rewritten accordingly. Currently, if you're a concealed carry permit hold you can be armed if you're going to pick up/drop off a kid.
Here's Virginia Code 18.2-308.1, "Possession of firearm, stun weapon, or other weapon on school property prohibited."
"The exemptions set out in � 18.2-308 shall apply, mutatis mutandis, to the provisions of this section. The provisions of this section shall not apply to... (vii) a person who has a valid concealed handgun permit and possesses a concealed handgun while in a motor vehicle in a parking lot, traffic circle, or other means of vehicular ingress or egress to the school."
Now, with that precedent, a committee, on the fly or not, would have an enormous uphill battle to even waste their time arguing that an arbitrary expansion of a school zone overrules the second amendment rights of passerby's and dutiful parents. If, however, you're intending to attend a PTA meeting and don't wish to leave yourself at risk in leaving your weapon locked in a compartment -- albeit that *should* be reasonably covered by law -- then we're back to parking off of the school's parking lot and walking a little extra distance. But, once more, specifically regarding the concern of arbitrary expansions of what is or is not a school zone shouldn't be a concern where this lies, at least with the legal avenues available for permitting.