You must retake the A1-A3 exam in order to renew your A1-A3 certificate.
The A1-A3 exam is an online exam you can take on any device (including tablet/smartphone).
You have 30 minutes for answering 20 multiple-choice question in the A1-A3 exam. The minimum score is 75%.
Free resits are available in your 30 days access period.