The following provisions apply only to discretionary interests:
A reasonableness standard may not be applied to the exercise of discretion by the trustee with regard to a discretionary interest. Other than for the three circumstances listed in this subdivision, a court has no jurisdiction to review the trustee's discretion or to force a distribution.
Absent express language to the contrary, in the event that the distribution language in a discretionary interest permits unequal distributions between beneficiaries or distributions to the exclusion of other beneficiaries, the trustee may distribute all of the accumulated, accrued, or undistributed income and principal to one beneficiary in the trustee's discretion.
Regardless of whether a beneficiary has any outstanding creditor, a trustee of a discretionary interest may directly pay any expense on behalf of such beneficiary and may exhaust the income and principal of the trust for the benefit of such beneficiary. No trustee is liable to any creditor for paying the expenses of a beneficiary of a discretionary interest.
SDCL 55-1-43