Source: Dear AFA

United's 2013 enrolled friend registration period is now open and you have until 1900 Central Time on December 30, 2012 to participate.  If you make no changes, your current enrolled friends will rollover from 2012 to 2013.  Once registration is closed you will not be able to make any changes until the 2014 registration period unless you experience a lifestyle change.  Details on what consists as a lifestyle change can be found on United's website. 

To register you must visit the "All About Me" section on United's Flying Together. For questions please see your local domicile supervisor.