Central Electricity Regulatory Commission(R-1)
Power Grid Corporation of India Limited (R-2)
Tamil Nadu Generation and Distribution Corporation Limited (R-3)
Transmission Corporation of Andhra Pradesh Ltd. (R-4)
Kerala State Electricity Board (R-5)
Tamil Nadu Electricity Board (R-6)
Electricity Department
Government of Goa. (R-7)
Electricity Department
Government of Pondicheey (R-8)
Eastern Power Distribution Company of Andhra Pradesh (R-9)
Southern Power Distribution Company of Andhra Pradesh Ltd. (R-10)
Southern Power Distribution Company of Telangana Limited (R-11)
Northern Power Distribution Company of Telangana Ltd. (R-12)
Transmission Corporation of Telangana Ltd. (R-13)
Karnataka Power Transmission Corporation Ltd. (R-14)
Tamil Nadu Transmission Corporation (R-15)
Madhya Pradesh Power Management Company Limited (R-16)
Maharashtra State Electricity Distribution Company Ltd. (R-17)
Gujarat Urja Vikas Nigam Limited (R-18)
Union Territory of Dadra and Nagar Haveli and Daman and DIU (R-19)
Chhasttisgarh State Electricity Board (R-20)
Madhya Pradesh Audyogik Kendra Vikas Nigam (Indore) Ltd. (R-21)