Agency under section 20 of the Toxic Substances Control Act to compel promulgation of the regulations required under this section and the Federal district court shall have jurisdiction to order such promulgation. (c) Penalties for violations (1) Monetary penalty Any person who knowingly violates any provision of this section shall be subject to civil money penalties in accordance with the provisions of section 102 of the Department of Housing and Urban Development Reform Act of 1989 ( 42 U.S.C. 3545 ). (2) Action by Secretary The Secretary is authorized to take such lawful action as may be necessary to enjoin any violation of this section. (3) Civil liability Any person who knowingly violates the provisions of this section shall be jointly and severally liable to the purchaser or lessee in an amount equal to 3 times the amount of damages incurred by such individual. (4) Costs In any civil action brought for damages, the appropriate court may award court costs to the party commencing such action, together with reasonable attorney fees and any expert witness fees, if that party prevails. (5) Prohibited act It shall be a prohibited act under section 409 of the Toxic Substances Control Act for any person to fail or refuse to comply with a provision of this section or with any rule or order issued under this section. For purposes of enforcing this section under the Toxic Substances Control Act, the penalty for each violation applicable under section 16 of that Act shall not be more than $10,000. (d) Validity of contracts and liens Nothing in this section shall affect the validity or enforceability of any sale or contract for the purchase and sale or lease of any interest in residential real property or any loan, loan agreement, mortgage, or lien made or arising in connection with a mortgage loan, nor shall anything in this section create a defect in title. (e) Effective date The regulations under this section shall take effect 3 years after the date of the enactment of this Act. II Lead Exposure Reduction 201.