In Calcutta HC, Joint Forum against NRC challenges Aadhaar Act 2023 regulation 28A. UIDAI counsel Gupta, Justices Sivagnanam, Bhattacharyya discuss Aadhaar’s non-citizenship proof, Foreigners Act, technical errors. ASG Chakraborty, PMO involved, single bench stay, Bengal Rajya Sabha member's input noted. Next hearing on July 11 for foreign nationals overstaying visas.