19 C.F.R. § 151.15
(a) Permission to transfer merchandise for examination. When a shipment requires examination at a centralized examination station (CES), Customs Form 3461, or Customs Form 3461 (ALT), or their electronic equivalents, for land border cargo, or an attachment to either, may be used to request permission to transfer the merchandise to a CES. The entry filer must write, type or stamp the following lines on the form or attachment, and must supply the information called for on the first three lines:
Containers to be transferred: ______ All or, Container #'s ______, ______, ______← To CES__________________________________← Approved by: U.S. Customs Inspector______← Date__________________________________←
Unless the port director exercises his authority pursuant to paragraph (d) of this section, the reviewing inspector will initial and date the form or attachment being used, or stamp one copy of the Customs Form 3461 or 3461 (ALT), or their electronic equivalents if required by the port director. A copy of this document will act as notification and authorization to the entry filer that the merchandise must be transferred to the importer-designated CES unless another CES is designated by the port director under paragraph (d) of this section.
(b) Assumption of liability during transfer. Merchandise designated for examination may be transferred from the importing carrier's point of unlading or from a bonded facility, to a CES, only if the transfer takes place under bond. The entry filer shall select one of the following bonded movements for the transfer to the CES unless the type of bonded movement to be used is specified by the port director under paragraph (d) of this section:
[T.D. 93-6, 58 FR 5606, Jan. 22, 1993, as amended by CBP Dec. 15-14, 80 FR 61290, Oct. 13, 2015]