For unrealised fair value reserves relating to financial instruments to be included in CET1 Capital, Islamic bank licensees and their auditor must only recognise such gains or losses that are prudently valued and independently verifiable (e.g. by reference to market prices). The CBB will closely review the components and extent of unrealised gains and losses and will exclude any that do not have reference to independent valuations (i.e. those made by bank management alone will not be included) or which are not deemed to be made on a prudent basis. As such, the prudent valuations, and the independent verification thereof, are mandatory. Unrealised gains and losses that have resulted from changes in the fair value of liabilities that are due to changes in the bank's own credit risk must be derecognised in the calculation of CET1 .