Aadhaar authentication required for GST registrants to enable filing revocation and refund applications and export refund claims. Rule 10B requires Aadhaar authentication for specified persons associated with a GST registration (proprietor, partners, karta, company directors, managing committee members, trustees, authorised signatory) to enable filing revocation of cancellation (Form GST REG-21), refund applications (Form RFD-01), and export refund claims under integrated tax rules; where Aadhaar is not yet assigned the enrolment ID plus a prescribed identity document may be furnished and the person must complete Aadhaar authentication within thirty days of allotment.