When an amount of property, whether real or personal, or both, has been set apart to be held by a householder as exempt under § 34-4, 34-4.1, or 34-13, such amount shall for a period of eight years from such setting apart be applied against the maximum amount to which the householder is entitled to set apart as exempt under § 34-4, 34-4.1, or 34-13.
Va. Code § 34-21