When it is impracticable to determine the period-specific effects of as accounting change on one or more prior periods presented, or to derermine the cumulative effect, FASB ASC 250, requires that the new accounting principle must be applied to the balances of the appropriate assets and liabilities as of the beginning of the earliest period for which retrospective application is practicable and a corresponding adjustment must be made to the opening balance of retained earnings for that period rather than being reported in an income statement. Finally, the guidelines contained as FASB ASC 250 require that a change in depreciation, amortization, or depletion method for long-loved, nonfinancial assets be accounted for as a change in accounting estimate (discussed below) effected by a change in accounting principle.