Section 90 in The Companies (Accounting Standards) Rules, 2006
90. On the date of this Standard becoming mandatory, the spare parts, which hitherto were being treated as inventory under AS 2, Valuation of Inventories, and are now required to be capitalised in accordance with the requirements of this Standard, should be capitalised at their respective carrying amounts. The spare parts so capitalised should be depreciated over their remaining useful lives prospectively as per the requirements of this Standard.
