Section 21. (a) In addition to any other remedies provided by law, a finding by the commission pursuant to an adjudicatory proceeding that there has been any violation of sections 2, 3, 8, 17 to 20, inclusive, or section 23, which has substantially influenced the action taken by any municipal agency in any particular matter, shall be grounds for avoiding, rescinding or canceling the action of said municipal agency upon request by said municipal agency on such terms as the interests of the municipality and innocent third persons require.
(b) In addition to the remedies set forth in subsection (a), the commission may, upon a finding pursuant to an adjudicatory proceeding that a person has acted to his economic advantage in violation of sections 2, 3, 8, 17 to 20, inclusive, or section 23, may issue an order (1) requiring the violator to pay the commission on behalf of the municipality damages in the amount of the economic advantage or $500, whichever is greater; and (2) requiring the violator to make restitution to an injured third party. If there has been no final criminal judgment of conviction or acquittal of the same violation, upon receipt of the written approval of the district attorney, the commission may order payment of additional damages in an amount not exceeding twice the amount of the economic advantage or $500, and payment of such additional damages shall bar any criminal prosecution for the same violation. The maximum damages that the commission may order a violator to pay under this section shall be $25,000. If the commission determines that the damages authorized by this section exceed $25,000, it may bring a civil action against the violator to recover such damages.
(c) The remedies authorized by this section shall be in addition to any civil penalty imposed by the commission in accordance with clause (3) of subsection (j) of section 4 of chapter 268B.