An agent may withdraw by giving notice to the principal. If a principal is incapable, the agent may withdraw by giving notice to the attending physician or provider. The attending physician or provider shall note the withdrawal as part of the principal’s medical record, and may continue treatment in accordance with the declaration to the extent such treatment is consistent with reasonable medical practice. A person who has withdrawn under the provision of this section may rescind the withdrawal by executing an acceptance after the date of the withdrawal. A person who rescinds a withdrawal shall give notice to the principal if the principal is capable or to the principal’s health care provider if the principal is incapable.