Section 13(1) in The Central Goods and Services Tax Rules, 2017
(1)A non-resident taxable person shall electronically submit an application, along with a self-attested copy of his valid passport, for registration, duly signed or verified through electronic verification code, in FORM GST REG-09, at least five days prior to the commencement of business at the common portal either directly or through a Facilitation Centre notified by the Commissioner:Provided that in the case of a business entity incorporated or established outside India, the application for registration shall be submitted along with its tax identification number or unique number on the basis of which the entity is identified by the Government of that country or its Permanent Account Number, if available.
