Such assessment or reassessment shall be made on the same basis as real estate is
required to be assessed under the provisions of the Code of Virginia, except that
such assessments or reassessments shall be made annually and the assessments and reassessments
so made shall have the same effect as if they had been made under the provisions of
the Code of Virginia; provided, however, that nothing contained herein shall prevent
the assessment or reassessment of real estate at more frequent intervals when so authorized
by the Code of Virginia.