Depreciation rules for electricity companies dictate using regulator notified rates and methodology to compute distributable profits for dividends. For companies engaged in generation or supply of electricity, depreciation for computing profits available for dividend under Section 205 must follow the rates and methodology notified under the Electricity Act and by CERC where inconsistent with Schedule XIV; adherence to the CERC framework constitutes sufficient compliance with Section 205 for entities covered by Section 616(c).