N.J. Stat. Ann. § 44:4-123

When the sums appropriated as provided in section 44:4-122 of this title are expended or exhausted during the year and for the purpose for which they were appropriated, and when separate appropriations are made for indoor and outdoor relief of the poor and any one of the appropriations is expended or exhausted, or is or may be inadequate alone for either such indoor or outdoor relief, the board of chosen freeholders may provide for the continuance of such relief as may be necessary for the balance of the fiscal year, by the appropriation of additional sums from time to time to carry out the provisions of this chapter.