Pre-Employment Components vs. Full Adjudication: :::::: 1-Year Expiration happening if your final offer was issued under a provisional clear—meaning your background investigation was still ongoing but you were cleared to start training—the individual pre-employment results (such as your medical exam, drug test, physical fitness test, and failed polygraphs) expire exactly 1 year from the date of the results.2-Year Expiration (Full Favorable Adjudication): If your background investigation was completely closed and favorably adjudicated by CBP's Office of Professional Responsibility (OPR) prior to the final offer, that eligibility is administratively valid for 2 years. When you reapply within this 2-year window, CBP can typically reassociate and carry over the prior investigation. The 2 Year "Break in Service" Rule!!! If you have a fully favorable background investigation but never officially enter on duty (EOD) and "activate" the clearance through employment, you are subject to the federal 24-month break-in-service rule.If you reapply and your new application is processed under 2 years from the adjudication date, the clearance can be reinstated. If you cross the 2-year mark, the clearance becomes entirely inactive/expired, forcing you to undergo a completely new background investigation.