It shall be lawful to trap opossum from November 15 through the last day of February, both dates inclusive, except there shall be a continuous open season to trap opossum within the incorporated limits of any city or town in the Commonwealth and; in the counties Counties of Arlington, Chesterfield, Fairfax, Henrico, James City, Loudoun, Prince William, Spotsylvania, Stafford, Roanoke, and York; and on private lands throughout the Commonwealth with permission of the landowner.