N.J. Stat. § 18A:40-2
Whenever the county superintendent shall certify to the commissioner that there has been subscribed or donated a sum not less than $4,000.00 for the purpose of paying the salary of a person to be known as county medical inspector of a county, the commissioner shall appoint, by and with the approval of the state board, a physician, licensed to practice medicine and surgery within the state, of at least two years practical experience, to be known as county medical inspector for such county. He shall perform such duties as shall be prescribed by rules adopted by the state board. His term of office shall be one year. No person shall be appointed as a county medical inspector in any year until there has been certified to the commissioner that a sum sufficient to pay the salary of such officer, but not less than $4,000.00, has been subscribed or donated as aforesaid.
N.J.S. § 18A:40-2