https://www.scconline.com/blog/post/2023/01/26/supreme-court-parties-can-adduce-evidence-or-additional-evidence-in-proceedings-under-section-34-of-arbitration-act-if-strong-exceptional-case-is-made-ou/
Supreme Court| Pre-amended Section 34(2)(a) shall be applicable on arbitration proceedings commenced and concluded prior to amendment of 2019