Migration of provisional GST registrations enables PID holders to complete migration and obtain a new GSTIN and certificate via GSTN mapping. Taxpayers holding only a provisional Identification Number must submit a request to the jurisdictional CGST nodal officer, then apply on the common portal using FORM GST REG-01 after GSTN's email. On approval they receive an ARN, new GSTIN and access token and must email these plus the old GSTIN to GSTN for mapping. GSTN will map the new GSTIN to the old PID and notify the taxpayer, who must first-time login with the old GSTIN to generate the registration certificate; the migrated registration is deemed effective from the rules' commencement date.