If the head of such branch, department, agency or instrumentality designates an officer or employee other than one who has control of the payment of the wages, as the party upon whom service of the notice of levy may be made, such head shall promptly notify the appropriate TTB officer of the name and address of each officer or employee so designated and the scope or extent of the authority of such designee.
27 C.F.R. §70.161
26 U.S.C. 6331 and 6332