19 U.S.C. § 1482
Section, acts June 17, 1930, ch. 497, title IV, §482, 46 Stat. 720; Proc. No. 2695, July 4, 1946, 11 F.R. 7517, 60 Stat. 1352; Oct. 25, 1951, ch. 562, §4(4), 65 Stat. 640; Aug. 8, 1953, ch. 397, §16(a), 67 Stat. 517; June 2, 1970, Pub. L. 91-271, title III, §301(h), 84 Stat. 288, set forth requirements for certified invoices including time of certification, declarations, number and destination of copies, and certification by other than an American consulate in remote areas.