15.5—Sensitive security information.

(a) In general. In accordance with 49 U.S.C. 40119(b)(1), SSI is information obtained or developed in the conduct of security activities, including research and development, the disclosure of which the Secretary of DOT has determined would—
(16) Other information. Any information not otherwise described in this section that TSA determines is SSI under 49 U.S.C. 114(s) or that the Secretary of DOT determines is SSI under 49 U.S.C. 40119. Upon the request of another Federal agency, the Secretary of DOT may designate as SSI information not otherwise described in this section.