What is a common limitation for driving a school bus related to demerit points?

When it comes to driving a school bus, a common limitation related to demerit points is set at six. This means that if a school bus driver accumulates six demerit points or more on their driving record, it can lead to penalties such as suspension or revocation of their driver's license. This rule is in place to ensure that school bus drivers maintain a high standard of driving, as they are responsible for the safety of children and other passengers. Therefore, the limit of six demerit points serves as a stricter guideline to promote safe driving behaviors and protect the well-being of students during transportation.