Aadhaar authentication required for non-individual GST registrants; alternate ID offered if Aadhaar unavailable to obtain registration. Specified non-individual persons - authorized signatories, managing and authorized partners, and the Karta of an HUF - must undergo Aadhaar authentication to be eligible for GST registration. If Aadhaar is not assigned, alternate and viable identification methods are to be provided as prescribed by the GST rules. The notification also declares the date from which these requirements operate.