N.J. Stat. § 40:27-6.3
Each subdivision application shall be submitted to the county planning board for review and, where required, approval prior to approval by the local municipal approving authority. County approval of any subdivision application affecting county road or drainage facilities shall be limited by and based upon the rules, regulations and standards established by and duly set forth in a resolution adopted by the board of chosen freeholders. The municipal approval authority shall either defer taking final action on a subdivision application until receipt of the county planning board report thereon or approve the subdivision application subject to its timely receipt of a favorable report thereon by the county planning board. The county planning board shall report to the municipal authority within 30 days from the date of receipt of the application. If the county planning board fails to report to the municipal approving authority within the 30-day period, said subdivision application shall be deemed to have been approved by the county planning board unless, by mutual agreement between the county planning board and municipal approving authority, with approval of the applicant, the 30-day period shall be extended for an additional 30-day period, and any such extension shall so extend the time within which a municipal approving authority shall be required by law to act thereon.
N.J.S. § 40:27-6.3