The split in the Mamata Banerjee-led TMC and the rebel faction’s decision to ‘merge’ with lesser known Nationalist Citizens Party has once again exposed the limits of the Tenth Schedule of the Constitution – popularly known as anti-defection law. Related news: Constitutional expert questions plan of TMC rebel MPs to seek 'real TMC' status from Speaker “Two-thirds MPs of TMC have given a letter to the Speaker for a separate seating arrangement.