According to the "Chinese People's *** and State Measurement Law" of the provisions: the people's government at or above the county level measurement of the administrative departments of the social public measurement of standard instruments, departments and enterprises, institutions, the use of the highest measurement of the standard instruments, as well as for trade settlements, safety and security, medical care and health, environmental monitoring included in the mandatory verification directory of the work of the measuring instruments, the implementation of mandatory verification. Not in accordance with the provisions of the application for verification or verification failed, shall not be used.
Other than the provisions of the preceding paragraph of the measurement of standard instruments and measuring instruments, the use of units should be regularly calibrated or sent to other metrological verification institutions, the people's government at or above the county level measurement of the administrative department shall supervise and inspect.