Professional Services by NRI

IGST WILL BE APPLICABLE IN YOUR CASE ON REVERSE CHARGE BASIS, NO GST REGISTRATION REQUIRED

But as per GST Act, Any person who occasionally undertakes transactions involving the supply of goods or services but who has no fixed place of business in India is to be treated as NRI, but in our case the person is providing services on regular basis and not occasionally, so he can't be treated as NRI, so whether he needs to take GST registration as regular taxpayer with threshold limit ? And till he is unregistered Indian company needs to make RCM ?