New Jersey Statutes Title 27. Highways 27 § 7-10

a. If the work for which reimbursement is made was paid for by the county out of moneys raised by the sale of its obligations, the moneys so repaid shall be used to retire such obligations or invested in such manner as may be lawful for sinking funds to be used for the retirement of such obligations when they become due and payable;

b. If the work for which such reimbursement is made was not paid for out of moneys raised by the sale of obligations of the county, such moneys may be used to retire county obligations or may be invested for sinking fund purposes, or a portion or all of it may be set apart and used for the improvement or reconstruction of, or for making extraordinary repairs upon any highway or highways which are a part of any county road system but which need not be a part of any state highway system;

c. The board of chosen freeholders of the county, upon the certification by the commissioner of the amount of moneys to be repaid, may make appropriations for the improvement, reconstruction or extraordinary repair of such highways, and enter into contracts therefor prior to the receipt of such money, and may temporarily finance such contracts by the issuance of temporary improvement notes which shall be paid and retired upon the receipt of the moneys from the state;

d. The expenditure of the money shall be under the control of the board of chosen freeholders of the county, and it shall not be necessary to submit plans and specifications for the improvement, reconstruction or extraordinary repairs to the commissioner, unless the highways are a part of the state highway system.