What must you ensure when requesting optional testing?

When requesting optional testing, it is crucial to ensure that the costs are covered by the employer or the driver’s insurance. This is important because optional tests can often involve additional expenses that may not be included in the standard DOT physical exam fee, and having insurance coverage can alleviate the financial burden on the individual. This promotes access to necessary evaluations without creating obstacles due to cost, ensuring that drivers can receive comprehensive assessments that may impact their health and ability to operate a commercial vehicle safely.

The context of this practice aligns with the DOT's goal of maintaining safety standards for drivers, which can include optional testing to rule out potential health issues before they affect driving capability. The other choices suggest various responsibilities regarding payment or the timing of tests, but the underlying principle focuses on insurance coverage as a means to facilitate necessary testing without causing financial strain.