Indiana Code Title 16. Health § 16-36-3-7

Sec. 7. The superintendent shall attempt to notify by certified mail any known relatives or friends of the patient of the patient's condition, the treatment determined to be necessary by the superintendent and the treating physician, and the result of the independent second opinion.  To the extent possible given the urgency of the circumstances, the superintendent shall allow a reasonable time within which to receive responses of persons notified and shall consider the responses received before taking final action.