Indiana Code Title 16. Health § 16-36-6-16

Sec. 16. (a) A:

or an employee under the direction of a person described in subdivisions (1) through (3) that acts in good faith and in accordance with reasonable medical standards to carry out the orders on a POST form, including a medical order for the withholding or withdrawal of life prolonging procedures, is not subject to criminal or civil liability and may not be found to have committed an act of unprofessional conduct.

(b) A health care provider may presume in the absence of actual notice or evidence to the contrary that a POST form executed in compliance with this chapter is valid and enforceable.