24. SUMMARY – IAS 16 VS IGAAP AS 10 CHANGE IN POLICY – RETROSPECTIVE EFFECT CHANGE IN ESTIMATE – PROSPECTIVE EFFECT CHANGE IN THE METHOD EXPENSED OFF TREATED AS A COMPONENT AND CAPITALISED OVERHAULING NO REGULAR UPDATION REGULAR UPDATION REVALUATION BASED ON SCH IV BASED ON USEFUL LIFE DEPRECIATION NOT MANDATED MANDATED COMPONENT APPROACH INDIAN GAAP IFRS Nature of item