Article 105 1.

All trading book positions and non-trading book positions measured at fair value shall be subject to the standards for prudent valuation specified in this Article. Institutions shall in particular ensure that the prudent valuation of their trading book positions achieves an appropriate degree of certainty having regard to the dynamic nature of trading book positions and non-trading book positions measured at fair value, the demands of prudential soundness and the mode of operation and purpose of capital requirements in respect of trading book positions and non-trading book positions measured at fair value.