More amendments to the Insolvency and Bankruptcy Code (IBC), including a provision to ensure that bankruptcy proceedings of the subsidiaries of the same company are referred to one bench of the National Company Law Tribunal, are in the works, top sources in the government have said.The amendment will also ensure that the same insolvency professional handles the insolvency proceedings of all the subsidiary firms of a company, an official in the know of the matter said. He refused to be identified as he is not authorised to speak to the media on the issue.