"It is a deliberate attempt to encroach on the state's powers. It is undemocratic, unconstitutional and unethical. It is also an attempt to destroy the federal structure of the country," Ms Banerjee told reporters in Kolkata.
"We are not accepting the ban. We will challenge it legally. We will consult the state's advocate general on this matter. I will request the centre not to interfere with the state's matter and destroy the federal structure," Ms Banerjee said.
Protests over the new rule were reported from parts of Kerala, Tamil Nadu and Karnataka today.
"The fundamental right to choice of food granted by the Constitution has been snatched away," DMK working president MK Stalin said, adding he will lead a protest on May 31 in Chennai.
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