48 CFR § 24.202 - Prohibitions.
(a) A proposal in the possession or control of the Government, submitted in response to a competitive solicitation, shall not be made available to any person under the Freedom of Information Act. This prohibition does not apply to a proposal, or any part of a proposal, that is set forth or incorporated by reference in a contract between the Government and the contractor that submitted the proposal. (See 10 U.S.C. 3309 and 41 U.S.C. 4702.)
(c) A dispute resolution communication that is between a neutral person and a party to alternative dispute resolution proceedings, and that may not be disclosed under 5 U.S.C. 574, is exempt from disclosure under the Freedom of Information Act (5 U.S.C. 552(b)(3)).