Dear Aspirant,

If you are availing admission in some college based upon your ews reservation then you need to use the certificate only for the one time and that will be all. However, the validity of EWS certificate is one year from the date of issue and if you want to use the ews reservation for any other facility like admission in some PG college or some scholarship scheme, etc you need to get a fresh certificate which have the validity.

Hope this helps, thank you.