((a)) ** .—** In this section, the term “proposal” means a proposal, including a technical, management, or cost proposal, submitted by a contractor in response to the requirements of a solicitation for a competitive proposal.

((b)) ** .—** A proposal in the possession or control of an executive agency may not be made available to any person under .

((c)) ** .—** Subsection (b) does not apply to a proposal that is set forth or incorporated by reference in a contract entered into between the agency and the contractor that submitted the proposal.