When requesting confidentiality, what should I submit?

Any person submitting information to NHTSA, other than information in a class identified in appendix C of this Part, and requesting that the information be withheld from public disclosure pursuant to 5 U.S.C. 552(b) shall submit the following: (a) The materials for which confidentiality is being requested, in conformance with §§ 512.5, 512.6, and 512.7 of this part; (b) The Certificate, in the form set out in appendix A to this part; (c) Supporting information, in conformance with § 512.8; and (d) Any request for an extension of time, made in accordance with § 512.11.