(82)Delegated acts should also be adopted to specify the requirements that AIFMs have to comply with when investing in such securitisation instruments; to specify administrative and accounting procedures, control and safeguard arrangements for electronic data processing and adequate internal control mechanisms; to specify the procedures for the proper valuation of the assets and the calculation of the net asset value per unit or share of the AIF, the professional guarantees the external valuer must be able to provide, and the frequency for valuation appropriate for open-ended AIFs.