It is lawful for any national bank to engage in trust business in this state to the extent authorized by the laws of the United States, without incorporating or organizing under the laws of this state, but a national bank shall otherwise comply with and be subject to all laws of this state which are applicable to state banks engaged in trust business including such examinations as may be deemed necessary, except that the authority of the commission and the director shall apply to their trust business only. The director may accept in lieu of an examination conducted under the director's direction, any report of examination conducted by the appropriate federal regulatory agency.
SDCL 51A-5-6