Hi Mody,
The authorization code that you use to request licenses will timeout with your EDN subscription (i.e. you won't be able to request new Basic deployment licenses after your EDN subscription has timed out), but the deployment license key/string itself which is returned by the Software Authorization Wizard and accessed via the License Viewer will not timeout.
I hope that clarifies the process, but if not, please don't hesitate to get in touch.
Cheers
Mike