An advance directive must be interpreted to carry out the known or demonstrable intent of the declarant. The following presumptions apply to an advance directive unless the terms of the advance directive explicitly prevent a presumption from applying:
each health care representative has concurrent authority to act individually and independently to make health care decisions for the declarant. If two (2) or more health care representatives who are required to act jointly disagree about a health care decision, or if two (2) or more health care representatives who are authorized to act independently give conflicting instructions to a health care provider, the health care provider may decline to comply with the conflicting instructions, and in an urgent or emergency situation, the health care provider may provide treatment consistent with the instructions of one (1) physician or one (1) advanced practice registered nurse who examines or evaluates the declarant.
each previous advance directive is superseded and revoked by the last signed advance directive.
Any health care representative may waive part or all of the compensation or expense reimbursements that the health care representative would be entitled to receive under the terms of the advance directive or under this subdivision.
then subject to any order of priority explicitly stated in the advance directive, each health care representative designated in the advance directive must be given the opportunity to exercise authority for the declarant.
Before issuing an order under this subdivision, the court must hold a hearing after notice to the declarant, to each health care representative, and any other person whose rights or authority could be affected by the order, and to any persons who have the highest priority under sections 42 and 43 of this chapter to serve as a proxy for the declarant if an advance directive had not existed. An order issued under this subdivision must be guided by the declarant's best interests and the declarant's known or demonstrable intent.
IC 16-36-7-34