(a) Prima facie evidence; collateral estoppel
A final judgment or decree heretofore or hereafter rendered in any civil or criminal proceeding brought by or on behalf of the United States under the antitrust laws to the effect that a defendant has violated said laws shall be prima facie evidence against such defendant in any action or proceeding brought by any other party against such defendant under said laws as to all matters respecting which said judgment or decree would be an estoppel as between the parties thereto: Provided, That this section shall not apply to consent judgments or decrees entered before any testimony has been taken. Nothing contained in this section shall be construed to impose any limitation on the application of collateral estoppel, except that, in any action or proceeding brought under the antitrust laws, collateral estoppel effect shall not be given to any finding made by the Federal Trade Commission under the antitrust laws or under section 45 of this title which could give rise to a claim for relief under the antitrust laws.

(b) Consent judgments and competitive impact statements; publication in Federal Register; availability of copies to the public
Any proposal for a consent judgment submitted by the United States for entry in any civil proceeding brought by or on behalf of the United States under the antitrust laws shall be filed with the district court before which such proceeding is pending and published by the United States in the Federal Register at least 60 days prior to the effective date of such judgment. Any written comments relating to such proposal and any responses by the United States thereto, shall also be filed with such district court and published by the United States in the Federal Register within such sixty-day period. Copies of such proposal and any other materials and documents which the United States considered determinative in formulating such proposal, shall also be made available to the public at the district court and in such other districts as the court may subsequently direct. Simultaneously with the filing of such proposal, unless otherwise instructed by the court, the United States shall file with the district court, publish in the Federal Register, and thereafter furnish to any person upon request, a competitive impact statement which shall recite—

(1) the nature and purpose of the proceeding;

(2) a description of the practices or events giving rise to the alleged violation of the antitrust laws;

(3) an explanation of the proposal for a consent judgment, including an explanation of any unusual circumstances giving rise to such proposal or any provision contained therein, relief to be obtained thereby, and the anticipated effects on competition of such relief;

(4) the remedies available to potential private plaintiffs damaged by the alleged violation in the event that such proposal for the consent judgment is entered in such proceeding;

(5) a description of the procedures available for modification of such proposal; and

(6) a description and evaluation of alternatives to such proposal actually considered by the United States.

(c) Publication of summaries in newspapers
The United States shall also cause to be published, commencing at least 60 days prior to the effective date of the judgment described in subsection (b) of this section, for 7 days over a period of 2 weeks in newspapers of general circulation of the district in which the case has been filed, in the District of Columbia, and in such other districts as the court may direct—

(i) a summary of the terms of the proposal for consent judgment,

(ii) a summary of the competitive impact statement filed under subsection (b),

(iii) and a list of the materials and documents under subsection (b) which the United States shall make available for purposes of meaningful public comment, and the place where such materials and documents are available for public inspection.

(d) Consideration of public comments by Attorney General and publication of response
During the 60-day period as specified in subsection (b) of this section, and such additional time as the United States may request and the court may grant, the United States shall receive and consider any written comments relating to the proposal for the consent judgment submitted under subsection (b). The Attorney General or his designee shall establish procedures to carry out the provisions of this subsection, but such 60-day time period shall not be shortened except by order of the district court upon a showing that (1) extraordinary circumstances require such shortening and (2) such shortening is not adverse to the public interest. At the close of the period during which such comments may be received, the United States shall file with the district court and cause to be published in the Federal Register a response to such comments. Upon application by the United States, the district court may, for good cause (based on a finding that the expense of publication in the Federal Register exceeds the public interest benefits to be gained from such publication), authorize an alternative method of public dissemination of the public comments received and the response to those comments.

(e) Public interest determination

(1) Before entering any consent judgment proposed by the United States under this section, the court shall determine that the entry of such judgment is in the public interest. For the purpose of such determination, the court shall consider—

(A) the competitive impact of such judgment, including termination of alleged violations, provisions for enforcement and modification, duration of relief sought, anticipated effects of alternative remedies actually considered, whether its terms are ambiguous, and any other competitive considerations bearing upon the adequacy of such judgment that the court deems necessary to a determination of whether the consent judgment is in the public interest; and

(B) the impact of entry of such judgment upon competition in the relevant market or markets, upon the public generally and individuals alleging specific injury from the violations set forth in the complaint including consideration of the public benefit, if any, to be derived from a determination of the issues at trial.

(2) Nothing in this section shall be construed to require the court to conduct an evidentiary hearing or to require the court to permit anyone to intervene.

(f) Procedure for public interest determination
In making its determination under subsection (e), the court may—

(1) take testimony of Government officials or experts or such other expert witnesses, upon motion of any party or participant or upon its own motion, as the court may deem appropriate;

(2) appoint a special master and such outside consultants or expert witnesses as the court may deem appropriate; and request and obtain the views, evaluations, or advice of any individual, group or agency of government with respect to any aspects of the proposed judgment or the effect of such judgment, in such manner as the court deems appropriate;

(3) authorize full or limited participation in proceedings before the court by interested persons or agencies, including appearance amicus curiae, intervention as a party pursuant to the Federal Rules of Civil Procedure, examination of witnesses or documentary materials, or participation in any other manner and extent which serves the public interest as the court may deem appropriate;

(4) review any comments including any objections filed with the United States under subsection (d) concerning the proposed judgment and the responses of the United States to such comments and objections; and

(5) take such other action in the public interest as the court may deem appropriate.

(g) Filing of written or oral communications with the district court
Not later than 10 days following the date of the filing of any proposal for a consent judgment under subsection (b), each defendant shall file with the district court a description of any and all written or oral communications by or on behalf of such defendant, including any and all written or oral communications on behalf of such defendant by any officer, director, employee, or agent of such defendant, or other person, with any officer or employee of the United States concerning or relevant to such proposal, except that any such communications made by counsel of record alone with the Attorney General or the employees of the Department of Justice alone shall be excluded from the requirements of this subsection. Prior to the entry of any consent judgment pursuant to the antitrust laws, each defendant shall certify to the district court that the requirements of this subsection have been complied with and that such filing is a true and complete description of such communications known to the defendant or which the defendant reasonably should have known.

(h) Inadmissibility as evidence of proceedings before the district court and the competitive impact statement
Proceedings before the district court under subsections (e) and (f) of this section, and the competitive impact statement filed under subsection (b) of this section, shall not be admissible against any defendant in any action or proceeding brought by any other party against such defendant under the antitrust laws or by the United States under section 15a of this title nor constitute a basis for the introduction of the consent judgment as prima facie evidence against such defendant in any such action or proceeding.

(i) Suspension of limitations
Whenever any civil or criminal proceeding is instituted by the United States to prevent, restrain, or punish violations of any of the antitrust laws, but not including an action under section 15a of this title, the running of the statute of limitations in respect to every private or State right of action arising under said laws and based in whole or in part on any matter complained of in said proceeding shall be suspended during the pendency thereof and for one year thereafter: Provided, however, That whenever the running of the statute of limitations in respect of a cause of action arising under section 15 or 15c of this title is suspended hereunder, any action to enforce such cause of action shall be forever barred unless commenced either within the period of suspension or within four years after the cause of action accrued.