Special GST migration procedure enables provisional ID holders to complete registration and obtain a permanent GSTIN upon mapping. Prescribes a special migration procedure for taxpayers with only a Provisional Identification Number to obtain a permanent GSTIN: furnish prescribed details to the jurisdictional nodal officer, apply in FORM GST REG-01 on the common portal after receiving GSTN e-mail, obtain ARN, new GSTIN and access token upon approval, submit mapping information (new GSTIN, access token, ARN and old GSTIN/PID) to GSTN for mapping, and perform first-time login with the old PID to generate the Registration Certificate.