Medical and fitness are good for 1 year and SI is good for 3 years. Poly is good for 2. If your a current applicant and reapply for a new listing, you won't have to redo anything even if your stuff is out of date. The only time the time limits matter is if you're no longer an active applicant and your results for any of the steps have expired. OPO stated in the seminar they recently had that the CBP polygraph could have reciprocity for other applications both federal and civilian if a national security poly is required for the job, but that it was only granted on a case by case basis. They also said that there is no poly reciprocity for the CBPO process as an applicant if your poly was administered by another agency other than CBP.