S.D. Codified Laws § 55-1-21.11
Unless specifically restricted by the governing instrument, an enforcer may appoint an individual or a corporate fiduciary as a co-enforcer. The appointed co-enforcer may serve only as long as the appointing enforcer serves, or as long as the last to serve if more than one enforcer appointed the co-enforcer. The appointed co-enforcer may not become a successor enforcer upon the death, resignation, or incapacity of the appointing enforcer, unless appointed under the terms of the governing instrument or unless no other successor enforcer, or method for appointing a successor enforcer, is provided in the governing instrument.
The powers and the responsibilities of the appointed co-enforcer may be limited by the appointing enforcer in a writing signed by the appointing enforcer at the time of the appointment. If the powers or responsibilities are so limited, the powers or responsibilities of the co-enforcer shall be limited as set forth in writing. Unless the powers or responsibilities are so limited, the appointed co-enforcer may exercise all the powers of the appointing enforcer. The combined powers of the appointed co-enforcer and the appointing enforcer may not exceed the powers of the appointing enforcer alone. The enforcer appointing a co-enforcer may, in writing, revoke the appointment at any time, with or without cause.
Unless specifically restricted by the governing instrument, if the governing instrument gives a fiduciary other than the enforcer the power to remove and replace the enforcer, such power includes the power to appoint a co-enforcer to serve with the current enforcer.
If an appointment under this section confers upon the appointed co-enforcer, to the exclusion of another co-enforcer, the power to take certain actions, including the power to direct or prevent certain actions of the enforcers, the limitations on liability and the relief from duties and obligations afforded an excluded fiduciary under § 55-1B-2 apply to a co-enforcer who does not hold such power.
If the governing instrument is silent concerning the enforcer's power to appoint a co-enforcer, the enforcer shall notify in writing, the trustor, if living, the current trustee or trustees, and any trust protector, trust advisors, and co-enforcers at least thirty days prior to the effective date of the enforcer's exercise of the power granted under this section. The notice, which shall include a copy of the proposed action, shall advise the trustor, the current trustee or trustees, trust protector, trust advisors, or co-enforcers that if they object to the enforcer's appointment, they need to file a written objection with the enforcer prior to the effective date set out in the notice of the proposed action. If an objection is received by the enforcer, prior to the effective date of the appointment, the enforcer may not appoint a co-enforcer. However, this section does not limit the power of the enforcer under law to petition the court for approval of the appointment. If no objection has been timely made, the proposed appointment becomes effective on the later of the date set out in the notice or thirty days after notice has been given. The notice shall be sent by any means allowed under the terms of the trust instrument or authorized in § 55-2-24 to the trustor, the current trustee or trustees, trust protector, trust advisors, or co-enforcers.
The provisions of this section are effective for trusts created before, on, or after July 1, 2023, except as otherwise directed by the trustor, current trustee or trustees, trust protector, trust advisors, or other fiduciary designated by the terms of the trust.
SDCL 55-1-21.11