If I do not pass my Exam, how long do I have to wait until I can attempt the Exam again?

Certiport has updated its certification exam retake policies globally as defined below on the 25th of October 2014. No action is required by Organisation Administrators for this change to go live at your Test Centre. Please click here to view Certiport's Exam Retake Policies by Program.
  Applies to: Exams delivered using Certiport Exam Delivery Systems.