- The constituent must be registered for the previous event and the current one,
- An admin must associate the previous event with the current one *before* the constituent registers for the current one,
- The site must be configured to use inherited content (which is on by default), and
- The constituent must have customized their Personal Page for the previous event.
If any of the four of these is not true, the content will not be inherited from the previous event to the current one.