(31)The assessment of whether an individual own-fund item is of sufficient duration should be based on the original maturity of that item. The average duration of an insurance or reinsurance undertaking's total own funds, taking into account the remaining maturity of all own-fund items, should not be significantly lower than the average duration of insurance or reinsurance undertaking's liabilities. Insurance and reinsurance undertakings should also assess whether the total amount of own funds is of a sufficient duration as part of their own risk and solvency assessment, taking into account both the original and remaining maturity of all own-fund items and of all insurance and reinsurance liabilities.