Annual Report 2010 - Christchurch City Council

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Statement of accounting policies (continued) Financial statements Annual Report Christchurch Otautahi 2010 p153. Notes to financial statements 1. Statement of accounting policies (continued) Income tax Income tax on the profit or loss for the year comprises current and deferred tax. Income tax is recognised through profit and loss except to the extent that it relates to items recognised directly in equity, in which case it is recognised in equity. Current tax is the expected tax payable on the taxable income for the year, using tax rates enacted or substantively enacted at the balance sheet date, and any adjustment to tax payable in respect of previous years. Deferred tax is provided using the balance sheet liability method, providing for temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for taxation purposes. The following temporary differences are not provided for: goodwill not deductible for tax purposes and the initial recognition of assets or liabilities that affect neither accounting nor taxable profit. The amount of deferred tax provided is based on the expected manner of realisation or settlement of the carrying amount of assets and liabilities, using tax rates enacted or substantively enacted at the balance sheet date. A deferred tax asset is recognised only to the extent that it is probable that future taxable profits will be available against which the asset can be utilised. Deferred tax assets are reduced to the extent that it is no longer probable that the related tax benefit will be realised. Research and development costs Research expenditure is recognised as an expense as incurred. Costs incurred on development projects (relating to the design and testing of new or improved products) are recognised as intangible assets when it is probable that the project will be a success considering its commercial and technological feasibility, and costs can be measured reliably. Other development expenditures are recognised as an expense as incurred. Development costs previously recognised as an expense are not recognised as an asset in a subsequent period. Development costs with a finite useful life that have been capitalised are amortised from the commencement of the commercial production of the product on a straight-line basis over the period of its expected benefit, not exceeding ten years. Goods and Services Tax The financial statements are prepared exclusive of GST with the exception of receivables and payables that are shown inclusive of GST. Where GST is not recoverable as an input tax it is recognised as part of the related asset or expense. Donated goods and services The Council receives the benefit of many services provided by volunteers. These services are greatly valued. They are, however, difficult to measure in monetary terms, and for this reason are not included in the financial statements, as their value from an accounting point of view is considered immaterial in relation to total expenditure. Cost allocations The costs of all internal service activities are allocated or charged directly to external service type activities. External service activities refer to activities which provide a service direct to the public. Internal service activities provide support for the external service activities. Where the recipient of an internal service can be identified, the cost recovery is made by way of a direct charge. Where this is not practical or the linkage is indirect, the costs are allocated by way of corporate overhead. Two primary drivers for allocating corporate overhead are used. Services related to people are reallocated based on employee costs, and those related to finance are reallocated based on external service activity gross cost. Plan values disclosed The plan values shown in the financial statements represent the 2009/10 budget included in the Long Term Council Community Plan 2009-19. Third party transfer payment agencies The Council collects monies for many organisations. Where collections are processed through the Council’s books, any monies held are shown as Accounts Payable in the Balance Sheet. Amounts collected on behalf of third parties are not recognised as revenue, but commissions earned from acting as agent are recognised in revenue.
p154. Annual Report Christchurch Otautahi 2010 Financial statements Statement of accounting policies (continued) Notes to financial statements 1. Statement of accounting policies (continued) Critical judgements, estimates and assumptions in applying Council’s accounting policies Preparing financial statements to conform with NZ IFRS requires management to make judgements, estimates and assumptions that affect the application of policies and reported amounts of assets and liabilities, income and expenses. The estimates and associated assumptions have been based on historical experience and other factors that are believed to be reasonable under the circumstances. These estimates and assumptions have formed the basis for making judgements about the carrying values of assets and liabilities, where these are not readily apparent from other sources. Actual results may differ from these estimates. Estimates and underlying assumptions are regularly reviewed. Any change to estimates is recognised in the period if the change affects only that period, or into future periods if it also affects future periods. In the process of applying these accounting policies, management has made the following judgements, estimates and assumptions that have had the most significant impact on the amounts recognised in these financial statements: • The physical deterioration and condition of an asset. This is particularly so for those which are not visible, for example stormwater, wastewater and water supply pipes that are underground. The risk is minimised by Council performing a combination of physical assessments and condition modelling of underground assets, estimating any obsolescence or surplus capacity of an asset and estimating the remaining useful lives over which the asset will be depreciated. These estimates can be impacted by the local conditions, for example weather patterns and traffic growth. If useful lives do not reflect the actual consumption of the benefits of the asset, then Council could be over or underestimating the annual depreciation charge recognised as an expense through the profit and loss. To minimise this risk Council’s infrastructural asset useful lives have been determined with reference to the NZ Infrastructural Asset Valuation and Depreciation Guidelines published by the National Asset Management Steering Group, and have been adjusted for local conditions and past experience. Finally, Council’s assets are also periodically revalued by experienced independent valuers who provide assurance that Council’s useful life estimates are valid. • The valuation of the Council’s investments in subsidiary and associated companies at fair value has a material impact on the amounts recognised in these financial statements and involves a significant amount of judgement. Independent valuers are commissioned to perform these valuations on a periodic basis, at intervals sufficient to ensure that the fair value of these investments does not differ materially from their carrying value. • The non-current provisions note discloses an analysis of Council’s exposure in relation to estimates and uncertainties surrounding the landfill aftercare and weathertight homes provisions. • Management are required to exercise judgement in calculating provisions for doubtful debts, assessing the level of unrecoverable work in progress and calculating provisions for employee benefits. • Management of subsidiary companies determine useful lives for particular assets. In making this assessment, they make judgements about the expected length of service potential of the asset, the likelihood of the asset becoming obsolete as a result of technological advances and the likelihood of the company ceasing to use the asset in its business operations. • Management of the subsidiary companies assess whether individual assets or groupings of related assets (which generate cash flows co-dependently) are impaired by estimating the future cash flows that those assets are expected to generate. Assumptions such as rates of expected revenue growth or decline, expected future margins and the selection of an appropriate discount rate for discounting future cash flows are required. In addition to the above factors, the following areas specific to individual companies within the group require critical judgement estimates and assumptions. • Orion New Zealand Ltd’s electricity distribution network comprises large numbers of relatively minor individual network asset components which are replaced on a regular basis. The costs of recording and tracking such components substantially outweigh the benefits of doing so. Management use estimates of the quantities and carrying values of these components. Any errors in the estimates are corrected at the next asset revaluation and are not considered to be material. • Orion New Zealand Ltd invoices its customers (predominantly electricity retailers) monthly for electricity delivery services on the basis of an estimation of usage, adjusted for the later, more accurate data available from the electricity wholesale market and certain metering data from electricity retailers. Management makes an allowance in revenue and in current assets/liabilities for any amounts which are estimated to be under/over charged during the reporting period. However, as final wash-up metering data is not available for in excess of twelve months, it is possible that the final amounts payable or receivable may vary from that calculated. • Orion New Zealand Ltd enters into arrangements with customers to purchase new network assets at below current replacement costs. Management estimate the difference between cash costs and the replacement costs of these assets, and the differences are reported within revenue. Any errors in estimating the carrying values of these assets are corrected at the next asset valuation date. • Management of Christchurch International Airport Ltd use judgement in identifying which components of property, plant and equipment are to be reclassified as investment property. The main deciding factor for this classification is that the property is not used for aircraft-related activities. • Management of Christchurch International Airport Ltd have estimated an impairment charge in respect of the ongoing value of capitalised expenditure on the integrated terminal project, due to the evolving nature of the design. Reviews by quantity surveyors and project managers were used in making the impairment assessment. • Management of Lyttelton Port Company Ltd are required to exercise judgement in determining the carrying value of land, buildings and harbour structures, amortisation of intangible assets such as resource consents, easements and software, and the quantification of contingent liabilities.
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Annual Report 2010 - Christchurch City Council

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