What is the required action if a driver has a known history of stage I hypertension but has not been treated?

A driver with a known history of stage I hypertension who has not received treatment cannot be qualified to drive commercially without proper medical management. This is because untreated hypertension poses significant health risks that can affect a driver's ability to operate a vehicle safely. The regulations stipulate that hypertension needs to be managed and controlled in order to ensure the safety of the driver and others on the road.

In this case, disqualification is necessary to ensure that the driver seeks appropriate treatment for their condition. Once the driver has received treatment and their blood pressure is controlled, they may then be eligible for qualification based on regulatory standards.

Certification typically requires that the individual is in a state of good health and that any medical issues are managed. Thus, without treatment for stage I hypertension, the driver does not meet the health criteria required for commercial driving.