"Chinese People's **** and State Measurement Law" provides that the people's governments at or above the county level measurement of the administrative departments of the social utility measuring instruments, departments and enterprises, institutions using the highest measurement standard instruments, as well as for trade settlement, safety and security, medical and health care, 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 unqualified verification, shall not be used. The implementation of mandatory verification of the work of measuring instruments catalog and management, developed by the State Council.
If the measuring instruments belonging to the mandatory verification, the newly purchased measuring instruments and equipment have a verification certificate, the use of the department in the use of the process, according to the instrument and equipment verification cycle sent to the measurement of qualification of the agency, the verification and the issuance of verification certificates.