19 C.F.R. § 191.72
Exportation of articles for drawback purposes must be established by complying with one of the procedures provided for in this section (in addition to providing prior notice of intent to export if applicable (see §§ 191.35, 191.36, 191.42, and 191.91 of this part)). Supporting documentary evidence must establish fully the date and fact of exportation and the identity of the exporter. The procedures for establishing exportation outlined by this section include, but are not limited to:
[T.D. 98-16, 63 FR 11006, Mar. 5, 1998, as amended by CBP Dec. 15-11, 80 FR 47407, Aug. 7, 2015]