A. A judgment for arrearage, or an order or decree of support for a spouse or support and maintenance of a child or children entered under the provisions of this chapter or §§ 16.1-278.15 through 16.1-278.18, 20-103 and 20-107.1 through 20-109 may be enforced in any garnishment proceeding in which the liability is against the United States of America.
B. Except as otherwise provided herein, the provisions of Article 7 (§ 8.01-511 et seq.) of Chapter 18 of Title 8.01 shall govern such garnishment. Any garnishment under the provisions of this section shall continue until modified by the issuing court, or in the case of an arrearage, until the sum or sums of money found to be in arrears are paid in full.
C. The provisions of this section shall apply to arrearages accumulated prior to and after July 1, 1976.