A driver with hypertension has lowered his blood pressure to less than or equal to 140/90, lost weight, and was removed from medications by his treating physician. The rest of the exam is unremarkable. What is the certification interval?

a) If the driver's history was Stage 3, the certification interval is 6 months.
b) If the driver's history was Stage 2, the certification interval is 1 year.
c) If the driver's history was Stage 1, the certification interval is 2 years.
d) Regardless of the driver's history, the certification interval is the Medical Examiner's decision, not to exceed two years.

The certification interval for a driver who has improved his hypertension status varies by the previous stage of hypertension, ranging between 6 months to 2 years, ultimately decided by the Medical Examiner.

Explanation:

The question asks about the certification interval for a driver who has managed to lower his blood pressure and improve his health significantly. The correct answer is that the certification interval depends on the driver's history of hypertension, as laid out in various stages. The intervals vary as follows:

If the driver's history was Stage 3, the certification interval is 6 months.
If the driver's history was Stage 2, the certification interval is 1 year.
If the driver's history was Stage 1, the certification interval is 2 years.
Regardless of the driver's history of hypertension stages, the certification interval is ultimately the Medical Examiner's decision, not to exceed two years.

The determination of the certification interval takes into account the specific health progress and current status of the driver, ensuring both safety and compliance with health standards.