AMC MCQ exam is held in Australia and at various venues in many other countries. The examination events held in Australia and New Zealand are large-scale events, with only one appointment time. However, a number of examination events held in countries other than Australia and NZ may have multiple appointment times depending on the regulations of the Pearson VUE centre. You should check the confirmation letter sent to you by Pearson VUE to note the appointment time. At all venues, candidates must arrive at least 30 minutes before the exam time.
Complete list of AMC MCQ exam venues is at http://www.amc.org.au/assessment/mcq-exam/mcq-venues