<h1>Biometric-based Aadhaar Authentication now required for GST registration applicants; appointment-based GSK verification and document checks follow.</h1> The Rule 8 amendment enables identification via data analysis and risk parameters using Biometric-based Aadhaar Authentication, photograph capture and original document verification; after filing Form GST REG-01 applicants receive either an OTP-based Aadhaar authentication link or a link to book an appointment at a designated GST Suvidha Kendra for biometric authentication and document verification, with ARNs generated after completion of biometric authentication and verification.