Section 31 in The Companies (Indian Accounting Standards) Rules, 2015
31. Similarly, if an entity uses a deemed cost in its opening Ind AS Balance Sheet for an investment in a subsidiary, joint venture or associate in its separate financial statements (see paragraph D15), the entity's first Ind AS separate financial statements shall disclose:
(a)the aggregate deemed cost of those investments for which deemed cost is their previous GAAP carrying amount;(b)the aggregate deemed cost of those investments for which deemed cost is fair value; and(c)the aggregate adjustment to the carrying amounts reported under previous GAAP.Use of deemed cost for oil and gas assets
