Case of Elecon Engineering Company Limited vs Bhartiya Rail Bijlee Company Limited, SC Judgement Dated 7th May 2026. The apex court held that a non-signatory collaborator can invoke an arbitration clause where the collaborator is an ‘inextricable and veritable party’ to the underlying contract. It held that the arbitration clause in the principal contract extended to the collaborator because the execution of a Deed of Joint Undertaking (DJU) by both the contractor and collaborator, and collaboration arrangement formed an integral and inseparable component of the main contract itself.