What will be the role of GSTN in registration?

The application for Registration will be made Online
on GST Portal.
Some of the key data like PAN, Business Constitution,
Aadhaar, CIN/DIN etc. (as applicable) will be validated
online against respective agency i.e. CBDT, UID, MCA etc,
thereby ensuring minimum documentation.
The application data, supporting scanned documents
shall be sent by GSTN to states/ Centre which in turn shall
send the query, if any, approval or rejection intimation
and digitally signed registration to GSTN for eventual
download by the taxpayer.