Section 5 in Central Electricity Authority (Installation and Operation of Meters) Regulations, 2006
5. Standards.-
All interface meters, consumer meters and energy accounting and audit meters shall -(a)comply with the relevant standards of Bureau of Indian Standards (BIS). If BIS Standards are not available for a particular equipment or material, the relevant British Standards (BS), International Electro-technical Commission (IEC) Standards, or any other equivalent Standard shall be followed:Provided that whenever an international Standard or IEC Standard is followed, necessary corrections or modifications shall be made for nominal system frequency, nominal system voltage, ambient temperature, humidity and other conditions prevailing in India before actual adoption of the said Standard;(b)conform to the standards on `Installation and Operation of Meters' as specified in Schedule annexed to these regulations and as amended from time to time.
