48 C.F.R. § 15.609
(a) An unsolicited proposal may include data that the offeror does not want disclosed to the public for any purpose or used by the Government except for evaluation purposes. If the offeror wishes to restrict the data, the title page must be marked with the following legend:
Use and Disclosure of Data This proposal includes data that shall not be disclosed outside the Government and shall not be duplicated, used, or disclosed—in whole or in part—for any purpose other than to evaluate this proposal. However, if a contract is awarded to this offeror as a result of—or in connection with—the submission of these data, the Government shall have the right to duplicate, use, or disclose the data to the extent provided in the resulting contract. This restriction does not limit the Government's right to use information contained in these data if they are obtained from another source without restriction. The data subject to this restriction are contained in Sheets [insert numbers or other identification of sheets].
(d) The agency point of contact shall place a cover sheet on the proposal or clearly mark it as follows, unless the offeror clearly states in writing that no restrictions are imposed on the disclosure or use of the data contained in the proposal:
Unsolicited Proposal—Use of Data Limited All Government personnel must exercise extreme care to ensure that the information in this proposal is not disclosed to an individual who has not been authorized access to such data in accordance with FAR 3.104, and is not duplicated, used, or disclosed in whole or in part for any purpose other than evaluation of the proposal, without the written permission of the offeror. If a contract is awarded on the basis of this proposal, the terms of the contract shall control disclosure and use. This notice does not limit the Government's right to use information contained in the proposal if it is obtainable from another source without restriction. This is a Government notice, and shall not by itself be construed to impose any liability upon the Government or Government personnel for disclosure or use of data contained in this proposal.
(f) When an agency receives an unsolicited proposal without any restrictive legend from an educational or nonprofit organization or institution, and an evaluation outside the Government is necessary, the agency point of contact shall—
(h) When an agency receives an unsolicited proposal with or without a restrictive legend from other than an educational or nonprofit organization or institution, and evaluation by Government personnel outside the agency or by experts outside of the Government is necessary, written permission must be obtained from the offeror before release of the proposal for evaluation. The agency point of contact shall—
[62 FR 51230, Sept. 30, 1997, as amended at 67 FR 13056, Mar. 20, 2002]