The Centre has informed the Delhi High Court that the Goods and Services Tax (GST) Council is the sole constitutional authority for deciding tax rates on air purifiers, opposing a plea to reduce the GST from 18% to 5% and classify them as medical devices. The government argued that judicial intervention would violate the separation of powers and cooperative federalism. It also stated that classifying air purifiers as medical devices could disrupt market supply and create monopolies due to increased regulatory compliance.