Aadhaar authentication requirement: registration eligibility tied to Aadhaar, with alternate identification where Aadhaar is unavailable. Notification requires Aadhaar authentication as a condition for individual registration under the Jharkhand GST rules and provides that where an Aadhaar number is not assigned the individual shall be offered alternate means of identification in accordance with the GST rules; the notification is made effective from the commencement date stated in the instrument.