When you start a new assignment, you will re-enroll in benefits if you want benefits through Trusted (or you can decide not to enroll).
If you do opt to re-enroll in benefits, you will have a new card sent to you, but you can continue with your old card and Aetna ID # if the benefits remain the same. If you choose different benefits, you can use your old card/ Aetna ID until the new card arrives, but when the new card arrives, you should use that one since it will have your updated benefits choices.