Section 15(4) in Tamil Nadu Electricity Regulatory Commission Intra State Open Access Regulations, 2005
(4)The Main and Check Meters shall be periodically tested and calibrated by State Transmission Utility in the presence of other party involved. Both parties shall seal Main and Check meters. Defective meter shall be replaced immediately. The periodicity of testing, checking, calibration etc., will be governed by the regulations issued by the Central Electricity Authority in this regard.
