ISSUE:
Whether there exists a valid arbitration agreement between the three parties, i.e., MTNL, Canara Bank, and CanFina?
RULE:
Groups of Companies Doctrine: The doctrine has been invoked by courts and tribunals for joining a non-signatory member of the group if the facts of the case determine that it was the mutual intention of all parties for binding the signatories as well as the non-signatories affiliates in the group.