GST registration certificate issuance: certificate and GSTIN assignment with effective date tied to timing of application. Where an application for registration is approved, a certificate of registration in FORM GST REG 06 showing the principal and additional places of business shall be made available on the common portal and a Goods and Services Tax Identification Number assigned; every certificate must be duly signed or verified through electronic verification code. The effective date of registration is the date the person becomes liable where the application was submitted within the prescribed thirty day period, otherwise the effective date is the date of grant of registration under the applicable approval sub rules.