A shareholder may vote the shareholder's shares in person or by proxy. Any shareholder or the shareholder's agent or attorney-in-fact may appoint a proxy to vote or otherwise act for the shareholder by signing an appointment form, or by an electronic transmission. An electronic transmission shall contain or shall be accompanied by information from which one can determine that the shareholder or the shareholder's agent or attorney-in-fact authorized the transmission.
SDCL 47-1A-722