Recently having encountered a NC licensed installer who acquired Virginia license by comity.
This individual approached my firm seeking experience in Virginia, but had no field experience neither having handling shovel or excavation equipment, materials such as PVC or other components used for installations in onsite industry.

Being curious I learned the standards of NC do not seem applicable to Virginia. Indeed the industry posted requirements for licensure don't seem to include practical experience, much less awareness of VDH regulations. There are NC contractors doing business in Virginia, notably in the manufactured housing trades. Complaints to DPOR seem not to confer any liability on tradesmen which are unlicensed, yet neither Secretaries of Health, nor Commerce seems to recognize the risk to improvements of real property.

Please consider the link: https://www.owpnc.com/industry-updates/how-to-get-a-septic-installer-license-in-north-carolina 

If DPOR offers implied protections for landowners, public, realtors or lenders perhaps these standards should be reviewed prior to completing the draft of future regulatory measures.