Oregon Revised Statutes Food and Other Commodities: Purity, Sanitation, Grades, Standards, Labels, Weights and Measures § 618.041

(1) Standards of weight and measure that are traceable to the United States prototype standards and that are supplied by the federal government or that are otherwise approved as being satisfactory by the National Institute of Standards and Technology shall be the state's primary standards of weight and measure.

(2) The state primary standards shall be kept in a safe and suitable place in the metrology laboratory of the office of weights and measures, and shall not be removed from the laboratory except for repairs or for calibration as may be prescribed by the National Institute of Standards and Technology.