25. IFRIC 1 Changes in Existing Decommissioning, Restoration and Similar Liabilities requires specified changes in a decommissioning, restoration or similar liability to be added to or deducted from the cost of the asset to which it relates; the adjusted depreciable amount of the asset is then depreciated prospectively over its remaining useful life. A first-time adopter need not comply with these requirements for changes in such liabilities that occurred before the date of transition to IFRSs. If a first-time adopter uses this exemption, it shall:
a) Measure the liability as at the date of transition to IFRSs in accordance with IAS 37;
b) To the extent that the liability is within the scope of IFRIC 1, estimate the amount that would have been included in the cost of the related asset when the liability first arose, by discounting the liability to that date using its best estimate of the historical risk-adjusted discount rate(s) that would have applied for that liability over the intervening period; and
c) Calculate the accumulated depreciation on that amount, as at the date of transition to IFRSs, on the basis of the current estimate of the useful life of the asset, using the depreciation policy adopted by the entity in accordance with IFRSs.