1. The maximum number of attempts allowed getting exhausted.
2. The registration getting expired.
3. The validity period of the EC/CC getting expired
Maximum Number of AttemptsThere is no specific mention regarding the maximum number of attempts
Expiry of RegistrationThe registration for the Intermediate is valid for a period of 5 years from the month in which his/her application, complete in all respects, is accepted for registration.
Expiry of CCThe CC is valid for a period of 3 years from the date of issue.
The candidate can revalidate the CC by a process called Revalidation of CC when it is expired or renew the registration when it is canceled. The candidate after revalidating his/her CC would be in the same position as if his/her CC is valid. This amounts to having no restriction on the number of attempts that one can make at the intermediate examination
However, the student whose registration has been cancelled on account of the expiry of the 5 year period subsequent to registration will not be permitted to attempt the examinations until he/she gets their registration revalidated by de novo registration.
Failing to get through within the maximum limit
If a candidates chances of making an attempt at the examination are exhausted on account of the registration getting canceled/expired, the candidate has to get his/her registration renewed i.e. Register De-Novo.
Renewing the registration or CC would put the candidate in the same state as if his/her CC or registration were valid and in force.