474.548.  Electronic will requirements. — 1.  An electronic will shall be:

  (1)  A record that is readable as text at the time of signing as provided in subdivision (2) of this subsection and remains accessible as text for later reference;

  (2)  Signed by:

  (a)  The testator; or

  (b)  Another individual in the testator's name, in the testator's physical presence, and by the testator's direction; and

  (3)  Signed in the physical or electronic presence of the testator by at least two individuals after witnessing:

  (a)  The signing of the will pursuant to subdivision (2) of this subsection; or

  (b)  The testator's acknowledgment of the signing of the will pursuant to subdivision (2) of this subsection or acknowledgment of the will.

  2.  The intent of a testator that the record in subdivision (1) of subsection 1 of this section be the testator's electronic will may be established by extrinsic evidence.

  3.  In accordance with the provisions of sections 474.337 or 474.550, a witness to a will shall be a resident of a state and physically located in a state at the time of signing if no self-proving affidavit is signed contemporaneously with the execution of the electronic will.