Your FAA Remote Pilot Certificate has a 24-month shelf life — which means that you’ll need to go through a recurrent knowledge testing process every two years to re-up and to maintain your stature as a commercially certificated sUAS operator.
The process for taking the recurrent knowledge test is similar to the first time you take the knowledge test, in that you need to book a testing appointment at one of around 700 FAA-approved knowledge testing centers across the United States.
Ready to book? It’s easiest to go through the CATSTest website at http://catstest.com/.
Make sure to select “Unmanned General — Recurrent” test when booking your test appointment.
There is no “grace” period — meaning that once your 24-month “currency” lapses or expires, you’re grounded until you can take your FAA Recurrent Knowledge Test.
The FAA has not put out guidance as far as penalties being involved for those who let the certificate actually expire before renewing so, at the moment it does not matter when you actually re-test.
For more information on studying for and scheduling your recurrent exam, you can either log into Drone Pilot Ground School and scroll down to Module 10, or you can visit these links: