Periodic medical evaluation.
CFR · 2024-01-01 · US · Title 5
At least once every 4 years, each agency will ensure that employees who operate Government-owned or leased vehicles are medically able to do so without undue risk to themselves or others. When there is a question about an employee's ability to operate a motor vehicle safely, the employee may be referred for a medical examination in accordance with the provisions of part 339 of this chapter.
official document · source cfr-2024 · id 5:§ 930.108