India, Sept. 21 -- The board of Tata Sons applied two different constitutional rules in 2022 and 2026 to reappoint its chairman, Tata Trusts chairman Noel Tata claimed, after N. Chandrasekaran won a third term at the helm of the conglomerate following a controversial vote.

Noel also said the board made the announcement even though the directors had agreed not to disclose the matter until a legal opinion was secured, and a general meeting approved Chandrasekaran's directorship.

After nearly four hours of unusual events at Thursday's meeting, Tata Sons released a one-page statement, saying its board had "resolved by a majority" to reappoint chairman N. Chandrasekaran for five more years.

After Tata Trusts nominees Noel and Venu Srinivasa...