N.J. Stat. § 18A:57-1 Payment of income for support of schools
Every county shall pay into the state treasury the interest on the principal of the surplus revenue which shall not have been repaid or redeposited in the state treasury, and the same, and the income on the surplus revenue repaid or redeposited by the county in the state treasury, shall be used for the support of the public schools.
L.1967, c.271.