26  Annual Report For assets not carried at revalued amount, the total impairment loss is recognised in the statement of financial performance. The reversal of an impairment loss on a revalued asset is credited to the revaluation reserve. However, to the extent that an impairment loss for that class of asset was previously recognised in the statement of financial performance, a reversal of the impairment loss is also recognised in the statement of financial performance. For assets not carried at a revalued amount the reversal of an impairment loss is recognised in the statement of financial performance. Financial instruments The Law Commission is a party to financial instruments as part of its normal operations. These financial instruments include bank accounts, short-term deposits, debtors and creditors. All financial instruments are recognised in the statement of financial position and all revenue and expenses in relation to financial instruments are recognised in the statement of financial performance. All financial instruments are shown at their estimated fair value. Creditors and other payable Creditors and other payables are measured at fair value. Employee entitlements Short term employee entitlements Employee entitlements that the Commission expects to be settled within 12 months of balance date are measured at undiscounted nominal values based on accrued entitlements at current rates of pay. These include salaries and wages accrued up to balance date, annual leave earned but not yet taken at balance date and sick leave. The Commission recognises a liability for sick leave to the extent that compensated absences in the coming year are expected to be greater that the sick leave entitlements earned in the same year. The amount is calculated based on the unused sick leave entitlement that can be carried forward at balance date to the extent that the Commission anticipated it will be used by staff to cover those future absences. Superannuation schemes Obligations for contributions to KiwiSaver and the New Zealand Government Superannuation Fund are accounted for as defined contribution superannuation schemes and are recognised as an expense in the statement of financial performance as incurred.