19 CFR § 191.153 - Continuous Customs custody.

(a) Merchandise released under an importer's bond and returned. Merchandise released to an importer under a bond prescribed by § 142.4 of this chapter and later returned to the public stores upon requisition of the appropriate Customs office shall not be deemed to be in the continuous custody of Customs officers.

(b) Merchandise released under Chapter 98, Subchapter XIII, Harmonized Tariff Schedule of the United States (HTSUS). Merchandise released as provided for in Chapter 98, Subchapter XIII, HTSUS (19 U.S.C. 1202), shall not be deemed to be in the continuous custody of Customs officers.

(c) Merchandise released from warehouse. For the purpose of this subpart, in the case of merchandise entered for warehouse, Customs custody shall be deemed to cease when estimated duty has been deposited and the appropriate Customs office has authorized the withdrawal of the merchandise.

(d) Merchandise not warehoused, examined elsewhere than in public stores—(1) General rule. Except as stated in paragraph (d)(2) of this section, merchandise examined elsewhere than at the public stores, in accordance with the provisions of § 151.7 of this chapter, shall be considered released from Customs custody upon completion of final examination for appraisement.

(2) Merchandise upon the wharf. Merchandise which remains on the wharf by permission of the appropriate Customs office shall be considered to be in Customs custody, but this custody shall be deemed to cease when the Customs officer in charge accepts the permit and has no other duties to perform relating to the merchandise, such as measuring, weighing, or gauging.