Section 233.4 - Preinspection outside the United States(a)Form I-425 agreements. A transportation line bringing applicants for admission to the United States through preinspection sites outside the United States shall enter into an agreement on Form I-425. Such an agreement shall be negotiated directly by the Service's Headquarters Office of Inspections and the head office of the transportation line.(b)Signatory lines. A list of transportation lines with currently valid transportation agreements on Form I-425 is maintained by the Service's Headquarters Office of Inspections and is available upon written request.62 FR 10353, Mar. 6, 1997