The international system of units of measurement and other units of measurement selected by the state are the national legal units of measurement. The names and symbols of national legal units of measurement are published by the State Council.
Measures for the administration of the use of non-statutory units of measurement due to special needs shall be formulated separately by the metrological administrative department of the State Council. Article 4 The metrological administrative department of the State Council shall exercise unified supervision and management over the national metrological work.
The metrological administrative departments of the local people's governments at or above the county level shall supervise and administer the metrological work within their respective administrative areas. Chapter II Metrological Standards, Metrological Standards and Metrological Verification Article 5 The metrological administrative department of the State Council shall be responsible for establishing various metrological standards as the highest basis for unifying national values. Article 6 The metrological administrative department of the local people's government at or above the county level shall, according to the needs of the local area, establish public standard instruments of measurement, which shall be used after passing the examination presided over by the metrological administrative department of the people's government at a higher level. Article 7 The relevant competent departments in the State Council and the people's governments of provinces, autonomous regions and municipalities directly under the Central Government may, according to the special needs of their departments, establish standard instruments of measurement for their own use, and the highest standard instruments of measurement shall be used after passing the examination presided over by the metrological administrative department of the people's government at the same level. Article 8 Enterprises and institutions may, according to their needs, establish standard instruments of measurement for their own use, and the highest standard instruments of measurement shall be used after passing the examination presided over by the metrological administrative department of the relevant people's government. Article 9 The metrological administrative department of the people's government at or above the county level shall carry out compulsory verification of the public standard instruments of measurement, the highest standard instruments of measurement used by departments, enterprises and institutions, and the working measuring instruments listed in the compulsory verification catalogue of trade settlement, safety protection, medical and health care and environmental monitoring. Those who fail to apply for verification according to regulations or fail to pass the verification shall not be used. The catalogue and management measures of working measuring instruments subject to compulsory verification shall be formulated by the State Council.
Other standard measuring instruments and working measuring instruments other than those specified in the preceding paragraph shall be regularly verified by themselves or sent to other metrological verification institutions for verification. Tenth metrological verification must be carried out in accordance with the national metrological verification system table. The national metrological verification system table shall be formulated by the metrological administrative department of the State Council.
Metrological verification must implement metrological verification regulations. The national metrological verification regulations shall be formulated by the metrological administrative department of the State Council. If there are no national metrological verification regulations, the relevant competent departments in the State Council and the metrological administrative departments of the people's governments of provinces, autonomous regions and municipalities directly under the Central Government shall formulate departmental metrological verification regulations and local metrological verification regulations respectively. Eleventh metrological verification work should be carried out in accordance with the principle of economy and rationality. Chapter III Management of Measuring Instruments Article 12 Enterprises and institutions that manufacture or repair measuring instruments must have facilities, personnel and verification instruments and equipment suitable for manufacturing or repairing measuring instruments. Thirteenth enterprises and institutions that manufacture measuring instruments to produce new measuring instruments that have not been produced by their own units must pass the measurement performance assessment of their samples by the metrological administrative department of the people's government at or above the provincial level before they can be put into production. Article 14 No unit or individual may, in violation of regulations, manufacture, sell or import measuring instruments that are not legal units of measurement. Fifteenth enterprises and institutions that manufacture or repair measuring instruments must verify the measuring instruments manufactured or repaired to ensure that the measuring performance of products is qualified, and issue product certificates for qualified products. Article 16 The use of measuring instruments shall not damage the accuracy of measuring instruments or the interests of the state and consumers. Seventeenth individual industrial and commercial households can manufacture and repair simple measuring instruments.
The scope and management measures for manufacturing and repairing measuring instruments by individual industrial and commercial households shall be formulated by the metrological administrative department of the State Council. Chapter IV Supervision of Metrology Article 18 The metrological administrative department of the people's government at or above the county level shall supervise and inspect the manufacture, repair, sale, import and use of measuring instruments, metrological verification and other relevant metrological activities according to law. The relevant units and individuals shall not refuse or obstruct. Article 19 The metrological administrative department of the people's government at or above the county level shall set up metrological supervisors as required. Measures for the administration of metrological supervisors shall be formulated by the metrological administrative department of the State Council. Article 20 The metrological administrative department of the people's government at or above the county level may set up metrological verification institutions according to needs, or authorize metrological verification institutions of other units to perform compulsory verification and other verification and testing tasks.
Personnel who perform the verification and testing tasks specified in the preceding paragraph must pass the examination. Article 21 Disputes arising from the accuracy of measuring instruments shall be handled according to the data verified by the national standard instruments of measurement or the public standard instruments of measurement. Twenty-second product quality inspection institutions that provide notarized data to the society must be qualified by the metrological administrative department of the people's government at or above the provincial level for their metrological verification and testing ability and reliability evaluation.