The Supreme Court banned Jallikattu in 2014 after activists said it constitutes extreme animal cruelty in the sport that involves young men wrestling with bulls to celebrate the harvest.
But early this year, the state government enacted a law to bypass the top court's verdict after massive protests erupted in Tamil Nadu. This law has been challenged in the court.

Young protestors at Chennai's Marina Beach last year
The state government, which exempted Jallikattu from the law to prevent cruelty to animals, had argued that the sport had been a tradition for 2,500 years and was part of Tamil Nadu's culture.
Animal rights activists and the government's Animal Welfare Board had contested this law, arguing that only the central government had the power to make changes to this law.
The court will also decide if the state legislature could remove the basis of a central law and still claim protection under constitutional provisions outlining separation of powers between the centre and the state.