New Jersey Statutes Title 52. State Government, Departments and Officers 52 § 29-2

The Department of Conservation and Economic Development shall cause to be made an examination of all the monuments marking the State boundary lines at least once in every 3 years and if any of them shall be found to have been injured, displaced or removed it shall, with persons duly authorized by the adjoining State, cause the same to be repaired, restored or replaced and cause suitable monuments to be set wherever they are wanting at points where the State boundary is intersected by the boundary of any municipalities or counties of this State or by any highway.