SDCL § 55-4-10: Loan of trust funds.

Except as provided in §§ 55-4-11 and 55-4-12, or except as may be expressly authorized by a court order, by the written consent of all qualified beneficiaries which may be given notwithstanding the provisions of § 55-4-31, by the written authorization from or direction by a trust protector, or by the terms of the governing instrument, which may be given by the settlor notwithstanding the provisions of § 55-4-30:

(1) No corporate trustee may lend trust funds to itself or an affiliate, or to any director, officer, or employee of itself or of an affiliate;

(2) No noncorporate trustee may lend trust funds to himself or herself, or to any relative, employer, employee, partner, or other business associate.