N.J. Stat. § 43:9A-2
Any clerk or deputy clerk of a county district court of a county of the first class, having a population of over eight hundred thousand, who shall have been for twenty-five years continuously in such office or position and in the office or position of clerk and assistant clerk of a district court of a city within said county who shall have reached the age of sixty years and become incapacitated for service in such office or position, which physical or other disability shall have developed during his term of service in either office or position, may be retired from service for these reasons upon informing the presiding judge of the court wherein he is serving or upon such information being given in his behalf of his desire to do so and of his disability; provided, such clerk or deputy clerk has complied with the provisions of this act. If the judge finds that disability exists, he shall appoint a physician of skill and repute in his profession, and resident in this State, who shall examine the person proposed for retirement and report on his physical condition or other disability and as to whether in all probability, if he finds the disability existent, it will continue permanently and does and will prevent the applicant from properly performing his duties. Upon receipt of the physician's report, the judge shall certify and send it to the finance officer of the county, there to remain of record. Thereupon the applicant may file his resignation in such office and shall be entitled to the benefit of this act.
N.J.S. § 43:9A-2