Conventional bank licensees which have the intention and capability to use internal models for the measurement of general interest rate risk and, hence, for the calculation of the capital requirement, must seek the prior written approval of the CBB for those models. The CBB's detailed rules for the recognition and use of internal models are included in Chapter CA-14. Conventional bank licensees which do not use internal models must adopt the standardised approach to calculate the interest rate risk capital requirement, as set out in detail in this Chapter.