N.J. Stat. § 43:10-78
Physical unfitness or incapacitation for further duty of any sergeant at arms or court crier shall for all purposes of this article be established and determined by a board of three physicians who shall be designated for that purpose as follows: One by the court of the county under which they are serving, one by sergeants at arms or court criers of such county, or a majority of them, and one by the county treasurer of such county; the three physicians so designated shall examine sergeants at arms or court criers applying for retirement upon half pay because of physical unfitness or incapacitation for further duty, and if they, or a majority of them, find him physically unfit or incapacitated for further duty they or a majority of them shall make and sign a certificate to that effect and file the same with the county treasurer, and thereupon the applicant shall be retired upon half pay.
N.J.S. § 43:10-78