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Noel Tata calls Chandrasekaran's reappointment ‘illegal’, cites Tata Sons' rules
Chandrasekaran reappointed Tata Sons chairman in U-turn weeks after seeking exit
‘Tata model has to be saved’: Noel Tata pushes back public listing of Tata Sons
No re-appointment, RBI row: What led to N Chandrasekaran's return as chairman

Twenty rebel TMC MPs have claimed a merger with a little-known party, triggering a fresh legal battle over the anti-defection law's merger exception.