is "more likely than not" to be sustained, but for a lesser amount, or (3) the tax position is "more likely than not" to be sustained, but not in the financial period in which the tax position was originally taken. For purposes of evaluating whether or not a tax position is uncertain, (1) we presume the tax position will be examined by the relevant taxing authority that has full knowledge of all relevant information, (2) the technical merits of a tax position are derived from authorities such as legislation and statutes, legislative intent, regulations, rulings and case law and their applicability to the facts and circumstances of the tax position, and (3) each tax position is evaluated without considerations of the possibility of offset or aggregation with other tax positions taken. We adjust these reserves, including any impact on the related interest and penalties, in light of changing facts and circumstances, such as the progress of a tax audit. 

A number of years may elapse before a particular matter for which we have established a reserve is audited and finally resolved. The number of years with open tax audits varies depending on the tax jurisdiction. The tax benefit that has been previously reserved because of a failure to meet the "more likely than not" recognition threshold would be recognized in our income tax expense in the first interim period when the uncertainty disappears under any one of the following conditions: (1) the tax position is "more likely than not" to be sustained, (2) the tax position, amount, and/or timing is ultimately settled through negotiation or litigation, or (3) the statute of limitations for the tax position has expired. Settlement of any particular issue would usually require the use of cash. 

Tax law requires items to be included in the tax return at different times than when these items are reflected in the consolidated financial statements. As a result, the annual tax rate reflected in our consolidated financial statements is different than that reported in our tax return (our cash tax rate). Some of these differences are permanent, such as expenses that are not deductible in our tax return, and some differences reverse over time, such as depreciation expense. These timing differences create deferred tax assets and liabilities. Deferred tax assets and liabilities are determined based on temporary differences between the financial reporting and tax bases of assets and liabilities. The tax rates used to determine deferred tax assets or liabilities are the enacted tax rates in effect for the year and manner in which the differences are expected to reverse. Based on the evaluation of all available information, the Company recognizes future tax benefits, such as net operating loss carryforwards, to the extent that realizing these benefits is considered more likely than not. 

We evaluate our ability to realize the tax benefits associated with deferred tax assets by analyzing our forecasted taxable income using both historical and projected future operating results, the reversal of existing taxable temporary differences, taxable income in prior carryback years (if permitted) and the availability of tax