A trustee can be discharged from his trust only as follows:

1. (1) By the extinction of the trust;
2. (2) By the completion of his duties under the trust;
3. (3) By such means as may be prescribed by the declaration of trust;
4. (4) By the consent of the beneficiary, if he has capacity to contract;
5. (5) By the judgment of a competent tribunal in a direct proceeding for that purpose that he is of unsound mind; or
6. (6) By the circuit court.

Source: SDC 1939, § 59.0218.