Cost accounting obligations require electricity companies to maintain detailed activity-wise cost records and comply with prescribed proformae. These Rules require companies engaged in electricity generation, transmission, distribution and supply to maintain detailed cost accounting records and statistical data, complete prescribed proformae within ninety days of the financial year end, and disclose bases and accounting policies for allocation of materials, labour, utilities, repairs, fixed assets and overheads. Methods must be equitable, reasonable and consistently applied; records must enable computation of activity-wise costs and support Cost Auditor reporting. Non-compliance attracts specified monetary penalties against companies and defaulting officers.