RUPNAGAR: The All India Power Engineers Federation (AIPEF) has opposed the Union power ministry’s proposal to make it mandatory for states to follow the tariff policy. AIPEF chief patron Padamjit Singh and spokesman VK Gupta, in a joint statement, said that under the new proposal, the central government will dictate the tariff structure of all states, thereby making the central electricity regulatory commission (CERC) and state electricity regulatory commissions (SERCs) subservient to policy dictates of Centre.