Va. Code Ann. § 15.2-2250

When a disagreement arises between the counties of Giles, Clarke, Culpeper, Loudoun or Mecklenburg and a municipality as to what regulations should be adopted for the area, and such difference cannot be amicably settled, then after ten days' prior written notice by either to the other, either or both parties may petition the circuit court for the county wherein the area or a major part thereof lies to decide what regulations are to be adopted. The court shall hear the matter and enter an appropriate order.