Note 3. Critical accounting judgements and key sources of estimation uncertainty (continued) Determining useful lives of assets The Consolidated Entity determines the estimated useful lives and related depreciation and amortisation charges for its property, plant and equipment and finite life intangible assets. The useful lives could change significantly as a result of technical innovations or some other event. The depreciation and amortisation charge will increase where the useful lives are less than previously estimated lives, or technically obsolete or non-strategic assets that have been abandoned or sold will be written off or written down. Recovery of deferred tax assets Deferred tax assets are recognised for deductible temporary differences only if the Consolidated Entity considers it is probable that future taxable amounts will be available to utilise those temporary differences and losses. Key sources of estimation uncertainty The key assumptions concerning the future, and other key sources of estimation uncertainty at the reporting period that may have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year, are discussed below. Share-based payment transactions The Consolidated Entity measures the cost of equity-settled transactions with employees by reference to the fair value of the equity instruments at the date at which they are granted. The fair value is determined by using either the Binomial or Black-Scholes model taking into account the terms and conditions upon which the instruments were granted. The accounting estimates and assumptions relating to equity-settled share-based payments would have no impact on the carrying amounts of assets and liabilities within the next annual reporting period but may impact profit or loss and equity. Fair value measurement hierarchy The Consolidated Entity is required to classify all assets and liabilities, measured at fair value, using a three level hierarchy, based on the lowest level of input that is significant to the entire fair value measurement, being: Level 1: Quoted prices (unadjusted) in active markets for identical assets or liabilities that the entity can access at the measurement date; Level 2: Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly; and Level 3: Unobservable inputs for the asset or liability. Considerable judgement is required to determine what is significant to fair value and therefore which category the asset or liability is placed in can be subjective. Incremental borrowing rate Where the interest rate implicit in a lease cannot be readily determined, an incremental borrowing rate is estimated to discount future lease payments to measure the present value of the lease liability at the lease commencement date. Such a rate is based on what the Consolidated Entity estimates it would have to pay a third party to borrow the funds necessary to obtain an asset of a similar value to the right-of-use asset, with similar terms, security and economic environment. Note 4. Operating segments The Consolidated Entity operates in the petroleum exploration industry within Australia and Cuba. The Board of Directors currently receive regular consolidated cash flow information as well as Consolidated Statement of Financial Position and Statement of Comprehensive Income information that is prepared in accordance with Australian Accounting Standards. The Board does not currently receive segmented Statement of Financial Position and Statement of Comprehensive Income information. The Board manages exploration activities of each permit area through review and approval of budgets, joint venture cash calls and other operational information. Information regarding exploration expenditure capitalised for each area is contained in Note 12. Notes to the Consolidated Financial Statements for the year ended 30 June 2025 58 Melbana Energy Limited Annual Report 2025
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