Section 5K. (1) A civil action pursuant to sections 5B to 5O, inclusive, for a violation of section 5B may not be brought (i) more than six years after the date on which the violation occurred; or (ii) more than three years after the date when facts material to the right of action are known or reasonably should have been known by the official within the office of the attorney general charged with responsibility to act in the circumstances, but in no event more than ten years after the date on which the violation is committed, whichever occurs last. A civil action pursuant to sections 5B to 5O, inclusive, may be brought for acts or omissions that occurred prior to the effective date of this section, subject to the limitations period set forth in this section.

(2) Notwithstanding any other law or rule of procedure or evidence, a final judgment rendered in favor of the commonwealth in any criminal proceeding charging fraud or false statements, whether upon a verdict after trial or upon a plea of guilty or nolo contendere, shall estop the defendant from denying the essential elements of the offense in any action which involves the same act, transaction or occurrence as in the criminal proceedings and which is brought under section 5B.