The three-time fail rule means:

1. An applicant who fails any exam three times is required to wait 30 days before retaking the exam.
2. An applicant who fails any exam three times is prevented from ever taking the test again.
3. An applicant who fails any exam three times is required to take a test for a different CDL class.
4. An applicant who fails any exam three times must take a class before taking the exam again.