Once you visit the PoP, you will have to fill in the prescribed form and submit the required documents. Your account will then be registered.
As of now, only Tier I accounts are available and these are non-withdrawal accounts.
Once registered, the Central Record-keeping Agency (CRA) will send you a Permanent Retirement Account Number (PRAN) along with telephone and Internet passwords.
The online site is: http://npscra.nsdl.co.in