N.J. Stat. § 51:1-55
The State superintendent shall be the custodian of all standards of weight and measure. He shall procure, at the expense of the State, a set of standards properly certified by the National Bureau of Standards. He shall maintain traceability of the State standards to the national standards in the possession of the National Bureau of Standards. He shall correct the standards of the several counties and municipalities, and other government agencies and shall at least once in five years compare them with the standards in his possession. In addition, he shall at least once in every five years calibrate or verify standards used by professional land surveyors and professional engineers in the performance of their duties, with the expense to be borne by the owners of the devices. The State superintendent, upon request, shall compare and verify any electronic distance measuring device, with the expense to be borne by the owner of the device.
N.J.S. § 51:1-55