(31)In order to ensure that institutions adequately manage their exposures in the form of units or shares in collective investment undertakings (CIUs), the rules spelling out the treatment of those exposures should be risk sensitive and should promote transparency with respect to the underlying exposures of CIUs. The BCBS has therefore adopted a revised standard that sets a clear hierarchy of approaches to calculate risk-weighted exposure amounts for those exposures. That hierarchy reflects the degree of transparency over the underlying exposures. Regulation (EU) No 575/2013 should be aligned with those internationally agreed rules.