Indiana Code Title 32. Property § 32-17-14-23

Sec. 23. (a) If, after an owner makes a beneficiary designation, the owner's marriage is dissolved or annulled, any provision of the beneficiary designation in favor of the owner's former spouse is revoked on the date the marriage is dissolved or annulled.  Revocation under this subsection is effective regardless of whether the beneficiary designation refers to the owner's marital status.  The beneficiary designation is given effect as if the former spouse had not survived the owner.

(b) Subsection (a) does not apply to a provision of a beneficiary designation that:

(c) A provision of a beneficiary designation that is revoked solely by subsection (a) is revived by the owner's remarriage to the former spouse or by a nullification of the dissolution or annulment of the marriage.