There has been no actually, peer-studied, published, definitive evidence that masks work. There is a lot of extrapolation from half-way done trials, no doubt, but hard evidence? And any info should come from an agency that people can trust, which will be a challenge. The CDC has been shown to lie, as did the WHO, as did the VA Governor.
If masks work, then why social distance? If social distancing works, why close everything? I suspect VA will try to mandate a vaccine for something with a 0.03% fatality rate, but I digress.
This a clear example of governmental and agency over-reach. The state needs to completely re-open.
If this does actually take effect it will be interesting to see what (and who) exemptions are contained in the final verbiage. We all know Governor Northam is a fan, and practitioner, of "its good for thee but not for me". Whether that is not wearing a mask or wearing blackface.
In closing I refer you back to our state's motto...but in today's vernacular, "karma's a witch".