A surviving spouse is not: A person who has received an absolute divorce from the decedent or whose marriage to the decedent has been validly annulled; Except as provided in subsection (b) of this section, a person who has voluntarily appeared in a proceeding in which an absolute divorce between the decedent and the survivor, or an annulment of their marriage was obtained, even though not recognized as valid in this State; A person who participates in a marriage ceremony with a third person, after a decree or judgment of divorce or annulment obtained by the decedent; or A person who has been convicted of bigamy while married to the decedent. Subsection (a)(2) of this section does not apply if the parties to the divorce or annulment subsequently remarry each other.