 Second, trustees can select the amount of trust property that the beneficiary receives.Although most discretionary trusts allow both types of discretion, either can be allowed on its own.It is permissible in most legal systems for a trust to have a fixed number of beneficiaries and for the trustees to have discretion as to how much each beneficiary receives, or to have a class of beneficiaries from whom they could select members, but provide that the amount to be provided is fixed.