Disagreements have also come to light between the Tata trustees — Mehli Mistry has clashed with Noel Tata and other trustees. For one, the matter of listing Tata Sons. Tata Sons is in the RBI’s Upper Layer list of non-banking financial companies, which requires it to be listed on the exchanges. But, this is not favoured by others, including Noel Tata. The application by Tata Sons to deregister as a core investment company is still under consideration.