Sec. 623. Bonds and other security.
Partners may not act as sureties upon bonds of their partnership. Stockholders of a corporate principal may be accepted as sureties provided their qualifications as such are independent of their holdings of the stock of the corporation.
A statement under this subdivision shall be furnished to the importer by the district director, upon request of the importer, in every case where such importer furnishes the district director with information which establishes to the satisfaction of the district director that the importer has given bond in an amount sufficient to protect the interests of the United States with respect to any tax under section 4061(a) which may become due in respect of the articles to which the request relates, and with such other information as is required under this subdivision to be shown in the statement. Such request, together with such information, shall be submitted by the importer immediately upon receipt by him of notice that articles taxable under section 4061(a) have been exported to his order. A separate request shall be made in respect of each shipment. Each statement given under this subdivision shall be executed in duplicate. The original of such statement shall be furnished by the district director to the importer and the copy shall be retained by the district director.
A statement under this subdivision shall be furnished to the importer by the district director on the date on which the district director determines that the importer is not required to give a bond under this section. Such statement shall be executed in triplicate. The original of such statement and one signed copy shall be furnished by the district director to the importer, and one copy shall be retained by the district director. Additional signed copies of such statement will be furnished by the district director to the importer upon request of the importer. However, once such statement, or a signed copy thereof, has been furnished by the importer to a collector of customs, the requirements imposed by subparagraph (1) of this paragraph are deemed to be satisfied in respect of all articles taxable under section 4061(a) which thereafter arrive in the United States for release to or for the importer in a port under the jurisdiction of such collector of customs, until such time, if any, as such collector of customs receives written notification from the district director or the Commissioner of Customs that such statement has been withdrawn.
26 C.F.R. §48.4061(a)-2
46 Stat. 759; 19 U.S.C. 1623