Why Change That Law?

I'm going through all the new laws the General Assembly of Virginia has passed and trying to figure out which ones change criminal or traffic laws so I can brief the local deputies and officers. Sometimes I wonder exactly why a change was made. For instance, as 46.2-859 currently stands, it is illegal to pass a (un)loading school bus:

A person is guilty of reckless driving who fails to stop, when approaching from any direction, any school bus which is stopped on any highway, private road or school driveway for the purpose of taking on or discharging children, the elderly, or mentally or physically handicapped persons, and to remain stopped until all the persons are clear of the highway, private road or school driveway and the bus is put in motion.

Apparently, that didn't work because the General Assembly is changing the statute (effective 01 July) to:

A person driving a motor vehicle shall stop, such vehicle when approaching, from any direction, any school bus which is stopped on any highway, private road or school driveway for the purpose of taking on or discharging children, the elderly, or mentally or physically handicapped persons, and shall remain stopped until all the persons are clear of the highway, private road or school driveway and the bus is put in motion; any person violating the foregoing is guilty of reckless driving.

The only reason I can conceive that this change is being made is that somewhere out there a defense attorney is arguing that the current statute is oblique and does not specifically require a driver to stop and therefore punishes drivers for doing an activity which they are not forbidden to do. It's a creative argument, but I can't see any judge I've practiced in front of buying it.

So, the question is, do I tell the LEO's about this or just blow it off as the General Assembly tweaking a statue without changing its meaning in any significant way?

Gotta admit, I'm leaning toward the second.