Leaders of various opposition parties attacked the Bharatiya Janata Party (BJP)-led Union government over the implementation of the Citizenship Act (CAA) The Centre on Monday implemented the CAA, notifying the rules four years after the contentious law was passed by Parliament in 2019 to fast-track citizenship for undocumented non-Muslim migrants from Pakistan, Bangladesh and Afghanistan. On Monday, Stalin said his government would not allow the law to be implemented in the southern state.