Biometric Aadhaar authentication required for high risk GST registrations, with in person verification at designated GSK centres. Biometric Aadhaar authentication will be applied to high risk GST registration applicants: Part B submissions of Form GST REG 01 will be risk scored and high risk applicants directed to GSK Centres for photographic capture, iris and fingerprint authentication, and original document verification. Fourteen GSK Centres, split between central and state control, will be staffed by designated BAOs and HBAOs; Joint Commissioners (ST) mapped to each Centre must provide space, furnish biometric booths, assign personnel, ensure continuous operation, and coordinate replacements and device functionality.