The conflict kicked off when Trustee Mehli Mistry questioned whether the vice chairmen were eligible based on faith and residency rules.
Singh pushed back, pointing to former Chief Justice MH Kania's opinion that non-Zoroastrians can be trustees, an opinion Sharma allegedly concealed from the resignation request.
Ketan Mukhija said Kania's view isn't legally binding, so this internal fight could shape how Tata Trusts is run going forward, especially after Ratan Tata's death in December 2024.