N.J. Stat. § 54:18-1
Each insurer, not organized under the laws of the State of New Jersey, which takes fire insurance risks on property in this State, shall on or before March 1 in each year, for the period during the 12 months ending December 31 of the preceding year, cause to be made to the Treasurer of the New Jersey State Firemen's Association, on behalf of each municipality or fire district in this State, for any property on which the insurer has taken any fire insurance risk situate therein, a true return in writing, verified by the oath of an officer or representative of the insurer, showing the amount of all premiums received by or agreed to be paid to the insurer, for insurance underwritten by that insurer against loss or injury by fire upon real or personal property, except automobiles that are not stored for sale, including loss of use thereof in the municipality, or fire district. The return also shall contain the Insurance Services Office "ISO" numerical identification code or designation assigned by the New Jersey State Firemen's Association for such municipality or fire district. The insurer shall, on or before March 1 of each year, pay to the Treasurer of the New Jersey State Firemen's Association the sum of 2% upon the amount of all the premiums received or agreed to be paid during the 12 months ending December 31 of the preceding year.
If the insurer fails to comply herewith, and the failure is reported to the Commissioner of Banking and Insurance in writing, attested by the oath of the Treasurer of the New Jersey State Firemen's Association, then the commissioner shall forthwith revoke the certificate of authority issued to the insurer, and, until the provisions of this chapter have been complied with by the insurer, it shall not transact further business in this State.
N.J.S. § 54:18-1