If a driver answers "not sure" to any question, what is the appropriate action?

When a driver responds with "not sure" to any question on their medical history or health status, the correct action is to address their uncertainty by asking further questions. This approach is essential for ensuring that all relevant medical information is accurately gathered. Understanding the driver's concerns or confusion allows the medical examiner to clarify any ambiguous points and obtain a more comprehensive understanding of the driver's health.

Engaging with the driver during the examination process not only helps in collecting accurate data, but it also supports the overall aim of the FMCSA regulations, which is to ensure that drivers are medically qualified to operate commercial vehicles safely. This interaction can potentially reveal important details that the driver might not initially consider significant, thus contributing to a more thorough evaluation.

Other options would not facilitate a proper understanding of the driver's health history. For instance, providing a waiver without clarification might overlook critical health issues, while crossing out the response could lead to incomplete records. Disqualifying a driver immediately would not only lack due diligence but could also deprive a qualified driver of their opportunity to clarify their health status and remain eligible to drive.