Can two appointed arbitrators (Hakamayn) proceed with a ruling if one or both spouses are absent after their appointment?

Primary text

If the two arbitrators are considered agents (wakilan), they may proceed with their ruling because agency is not invalidated by absence. If they are considered judges (Hukim), they may not finalize the judgment because judgment for an absent party is impermissible, unless the spouses had authorized them as agents, in which case they act based on the agency, not the judicial authority.