19 C.F.R. § 115.13
Each Certifying Authority shall furnish the Headquarters, U.S. Customs Service, Office of Field Operations, 1300 Pennsylvania Avenue, NW., Washington, DC 20229, unless waived by Customs;
[T.D. 86-92, 51 FR 16161, May 1, 1986, as amended by T.D. 99-27, 64 FR 13675, Mar. 22, 1999]