(4)On 19 October 2011, the IASB issued Interpretation 20 of the International Financial Reporting Interpretations Committee (‧IFRIC") Stripping Costs in the Production Phase of a Surface Mine ("IFRIC 20"). The objective of IFRIC 20 is to provide guidance on recognition of production stripping costs as an asset and on the initial and subsequent measurement of the stripping activity asset in order to reduce the diversity in practice as to how entities account for stripping costs incurred in the production phase of a surface mine.