It is highly encouraged that candidates show up at the testing facility at least 30 minutes before the time that the examination is scheduled to begin.
This will give you sufficient time to finish the check-in process, which includes verifying your identity, and to become accustomed to the environment of the testing centre. If you get there early, you’ll have time to settle in, take a deep breath, and get your nerves under control before the test starts.
Remember that those who are late to the exam will not be allowed to take it and will be required to reschedule it for a later time; therefore, it is extremely important to come on time.