Indiana Code Title 29. Probate § 29-2-16.1-8

Sec. 8. (a) Subject to subsections (b) and (c), unless barred by section 6 or 7 of this chapter, an anatomical gift of a decedent's body or part for the purpose of transplantation, therapy, research, or education may be made by any member of the following classes of persons who are reasonably available, in the order of priority listed:

(b) If there is more than one (1) member of a class listed in subsection (a)(1), (a)(3), (a)(4), (a)(5), (a)(6), (a)(7), or (a)(8) entitled to make an anatomical gift, an anatomical gift may be made by a member of the class unless that member or a person to whom the gift may pass under section 10 of this chapter knows of an objection by another member of the class.  If an objection is known, the gift may be made only by a majority of the members of the class who are reasonably available.

(c) A person may not make an anatomical gift if, at the time of the decedent's death, a person in a prior class under subsection (a) is reasonably available to make or to object to the making of an anatomical gift.