Weights and measures that are traceable to the United States prototype standards supplied by the federal government, or approved as being satisfactory by the national bureau of standards shall be the state primary standards of weights and measures. The state primary standards shall be maintained in such calibration as prescribed by the national bureau of standards. Secondary standards may be prescribed by the director. Secondary standards shall be verified upon their initial receipt and as often thereafter as deemed necessary by the director.
NMS § 57-17-3