[The following paragraph was effective for interim periods within fiscal years beginning after December 15, 2002. It was amended, effective for reviews of interim periods within fiscal years beginning on or after December 15, 2010. See PCAOB Release No. 2010-004
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The accountant who has audited the entity’s financial statements for one or more annual periods would have acquired sufficient knowledge of an entity’s internal control as it relates to the preparation of annual financial information and may have acquired such knowledge with respect to interim financial information. If the accountant has not audited the most recent annual financial statements, the accountant should perform procedures to obtain such knowledge. Knowledge of an entity’s internal control, as it relates to the preparation of both annual and interim financial information, includes knowledge of the relevant aspects of the control environment, the entity’s risk assessment process, control activities, information and communication, and monitoring, as those terms are defined in section 319, Consideration of Internal Control in a Financial Statement Audit. Internal control over the preparation of interim financial information may differ from internal control over the preparation of annual financial statements because certain accounting principles and practices used for interim financial information may differ from those used for the preparation of annual financial statements, for example, the use of estimated effective income tax rates for the preparation of interim financial information, which is prescribed by Accounting Principles Board (APB) Opinion No. 28, Interim Financial Reporting.