19 C.F.R. § 142.19
Merchandise, for which an entry summary serves as both an entry and an entry summary, shall not be released from Customs custody until a bond has been filed, or the entry has been liquidated, as follows:
(a) Bond. Merchandise not designated for examination may be released to, or upon the order of, the carrier if a bond is filed on Customs Form 301, containing the bond conditions set forth in § 113.62 of this chapter. Merchandise designated for examination may be released under the bond after examination has been completed if:
(b) After liquidation. If a bond has not been filed in accordance with paragraph (a) of this section, the merchandise shall not be released before:
(3) All documents relating to the merchandise which are required by law or regulation have been filed.
(R.S. 251, as amended, secs. 623, as amended, 624, 46 Stat. 759, as amended (19 U.S.C. 66, 1623, 1624))
[T.D. 79-221, 44 FR 46821, Aug. 9, 1979, as amended by T.D. 84-213, 49 FR 41185, Oct. 19, 1984]