18. a. Any person convicted of violating any provision of this act or of any rule or regulation adopted hereunder shall be subject to a penalty of not less than $100.00 nor more than $1,000.00 for each violation. The penalty shall be collected, and enforced in summary proceedings under the penalty enforcement law (N.J.S.2A:58-1 et seq.).
b. A person who collects any amounts that were billed in violation of section 1 of P.L.1997, c.156 (C.45:9-42.41a), is liable for, and shall refund on a timely basis to the person who was billed, any amounts so collected.