Goa, Sept. 17 -- A major governance dispute has erupted within the Tata Group after Tata Trusts objected to the reappointment of N Chandrasekaran as Tata Sons chairman, calling the board's decision "illegal" and a "legal nullity".

The Tata Sons board on Thursday approved a fresh five-year term for Chandrasekaran, whose current tenure is scheduled to end on February 20, 2027. The decision came weeks after Chandrasekaran had reportedly informed directors that he did not intend to seek another term.

Tata Trusts, which control about 66% of Tata Sons along with affiliated trusts, has challenged the validity of the board resolution. The Trusts said Noel N Tata, chairman of Tata Trusts and one of its nominee directors on the Tata Sons board, v...