
      Any action to enforce any cause of action under section 15, 15a,
    or 15c of this title shall be forever barred unless commenced
    within four years after the cause of action accrued. No cause of
    action barred under existing law on the effective date of this Act
    shall be revived by this Act.

                                AMENDMENTS                            
      1976 - Pub. L. 94-435 substituted "section 15, 15a, or 15c" for
    "sections 15 or 15a".
                              EFFECTIVE DATE                          
      Section 4 of act July 7, 1955, provided: "This Act [enacting this
    section and section 15a of this title, amending section 16 of this
    title, and repealing provisions set out as a note under section 15
    of this title] shall take effect six months after its enactment
    [July 7, 1955]."

Last modified: June 14, 2006