SDCL § 55-1A-36: Holding of two or more trusts with undivided interests.

A trustee may hold two or more trusts or parts of trusts created by the same instrument, as an undivided whole, without separation between such trusts or parts of such trusts; provided that, such separate trusts or parts of such trusts shall have undivided interests and that no such holding shall defer the vesting of any estate in possession or otherwise.