49 C.F.R. § 1544.239
This section applies to each aircraft operator operating under a full program under § 1544.101(a) of this part and to each aircraft operator with a TSA security program approved for transfer of cargo to an aircraft operator with a full program or a foreign air carrier under paragraphs § 1546.101(a) or (b) of this chapter.
(a) For cargo to be loaded on its aircraft in the United States, each aircraft operator must have and carry out a known shipper program in accordance with its security program. The program must—
(b) When required by TSA, each aircraft operator must submit in a form and manner acceptable to TSA—
[71 FR 30511, May 26, 2006]