Cost Accounting Records (Fertilizer Industry) Rules require fertilizer companies to maintain prescribed cost records and submit certified compliance reports. Applicable fertilizer companies must maintain detailed cost records and books of account enabling calculation of per unit cost of production, cost of sales and margins for each product and activity, prepared in accordance with Generally Accepted Cost Accounting Principles and Cost Accounting Standards. Records must be kept for at least eight preceding financial years, reconciled with audited financial statements, and the company must submit an electronic compliance report and annexure certified by a Cost Accountant and approved by the Board within 180 days of the financial year end.