At what point during the process can a spouse remarry or start dating?

You cannot remarry until after the divorce has been final for 30 days. After the final hearing, there is a 30-day appeal period. You should not get married until the expiration of this 30-day period.

While many spouses start dating during separation, it is not recommended.  You are married until the judge approves the final divorce decree. Dating during separation is adultery.