A patient with decision-making capacity may revoke a MOST at any time by:
An authorized representative may not revoke a MOST unless the MOST was executed by the authorized representative. The authorized representative shall make the revocation in writing.
A revocation is effective upon communication to the health care provider. A health care provider who is informed of a revocation shall record the date and time of the notification of revocation in the patient's medical record.
SDCL 34-12H-9