Sorry if I wasn't clear. Application should be updated every six months. Your medical should be current. If you are under 40 then the annual class one is current. Over 40 every six months.

Basically keep your application data updated, no longer than every 6 months and medical current for your appropriate age. If you had expired or out of date info and was passed for the candidate selection don't worry. Once you update your information the next candidate selection will include you. Example, you were #100 on the applicant list. Based on needs we wanted 100 to call for December. Now let's assume you had not updated your data or medical. You would be skipped and we would go to the next candidate on the list. Your spot will not disappear. If you then update your data and/or get a current medical then the next round of selection will have you back on the list and at the top. If you don't update then you will continually be skipped until you do.

PS update your data with any and everybody you apply to at least every six months. I recommend every 2-3 months and let nothing appear to expire on applications.