If you do not achieve a passing score on an IASSC Examination on your first attempt, a 2nd sitting for the same examination may not be undertaken within two weeks of the first sitting. A 3rd sitting may not be undertaken within three months of the first sitting. Any subsequent sittings must be at least three months apart from the most recent failed sitting.
Each IASSC exam voucher is only valid for one attempt at an exam. If you do no pass, you will need to purchase another exam voucher if you wish to retake it.