You must petition and submit supporting documentation within 5 business days from the date of the missed examination. Check eService regularly as you will receive updates and messages in your inbox.
What is an already deferred exam?
Here is an example: You took POLC37H in Fall 2021, but you were unable to write the exam in December 2021 for documented reasons, and deferred it to April 2022. Now you have missed this exam again.
If your petition is approved, you will receive your deferred exam schedule in your eService inbox. These are typically scheduled in the next exam period.