You have 1 year from travel date to use up your ticket. Not from the date of issue unless you change your original departure date.

Say you decide to issue a ticket for travel in July 22nd, 2003. If you issue the ticket in Sept 01,2002, and if you stick with the original departure date, your ticket is valid till July 22, 2004.

However if you change your departure date, ie to a later date after your ticket has been issued, if the ticket does not have to be reissued, you're still stuck with July 22, 2004. But if you have to reissue your ticket for any reason, then your expiry date will be 1 year from date of issue which will be Sept 2003.