SDCL § 55-4-14: Permitted sales between trusts held by same corporate trustee.

A corporate trustee may sell stocks, bonds and other securities listed on all exchange supervised by the securities and exchange commission as well as obligations of the U.S. treasury and obligations of U.S. government agencies held by it in one account to itself as trustee of another account if the transaction is fair to both accounts and if such transaction is not prohibited by the instruments creating the trustee relationships.