<h1>Biometric Aadhaar Authentication required for GST registration applicants; GSK appointments and document verification precede ARN generation.</h1> Amendment to Rule 8 authorizes identification of GST registration applicants via data analysis enabling Biometric-based Aadhaar Authentication and on-site original document verification; after Form GST REG-01 submission applicants receive either an OTP-based Aadhaar link or an appointment-booking link for a designated GST Suvidha Kendra, and ARNs are generated only after completion of biometric authentication and document verification.