A Hindu couple having the decree of judicial separation wants to live together :

A decree of judicial separation under section 10 of the Hindu Marriage Act, 1955 does not end the marriage; it only provides that "it shall no longer be obligatory for the petitioner to cohabit with the respondent". Because the parties remain husband and wife, they may simply resume living together.

No fresh marriage is needed, since the marriage was never dissolved. Section 10(2) lets the court rescind the decree on the petition of either party, but resuming cohabitation does not depend on the court's permission.