Any notice, report, or other document filed with SIPC pursuant to this chapter shall be available for public inspection unless SIPC or the Commission shall determine that disclosure thereof is not in the public interest. Nothing herein shall act to deny documents or information to the Congress of the United States or the committees of either House having jurisdiction over financial institutions, securities regulation, or related matters under the rules of each body. Nor shall the Commission be denied any document or information which the Commission, in its judgment, needs.