N.J. Stat. § 27:9-11: Maturity of bonds arranged

In fixing the time or times of maturity of the principal of any such bonds, the board of chosen freeholders shall consider the amounts to be received each year by way of reimbursement and shall endeavor to arrange the times of maturity of the principal so that the levy of a tax will not be necessary in order to pay either the principal or interest of the bonds.