Section 68(c) in The Companies (Accounting Standards) Rules, 2006
(c)a change in the liability is an indication that the asset may have to be revalued in order to ensure that the carrying amount does not differ materially from that which would be determined using fair value at the balance sheet date. Any such revaluation should be taken into account in determining the amounts to be taken to the statement of profit and loss and the owners' interest under (a). If a revaluation is necessary, all assets of that class should be revalued.
