Yes, CMX candidates can retake each exam Level as many times as they want.
If you re-register for an exam in the same level you failed, you can remove the enrollment fee during your registration. The enrollment fee is waived for re-registrations made for the same Level and within 1 year after candidates received the results stating they failed. This discount is cumulative and can be applied along with other promotions.
As an example, the full price of a Level 2 exam is $200. Therefore, for candidates retaking this exam will only have to pay $140, as the enrollment fee of $60 has been waived. This $60 discount is applied as well for Early Bird price or any other active promotion.