Aadhaar authentication requirement for GST registration established, with alternate identification permitted where Aadhaar is not assigned. Notification requires Aadhaar authentication of an individual's Aadhaar number as the criterion for eligibility for GST registration under the state GST rules, while providing for alternate and viable means of identification where Aadhaar is not assigned; the Governor issues the notification under statutory authority and declares it to have come into force from the stated commencement date.