Which statement accurately describes Massachusetts CLP operation after passing the P and S written exams?

1. The driver may operate only the same class permitted vehicle while accompanied by a properly licensed operator with the correct class and endorsements
2. The CLP holder may transport students alone once the written tests are passed
3. The CLP holder may drive any school bus class without a certificate or supervising driver
4. The P and S endorsements on a CLP remove all medical certification requirements