By when must a medical examiner submit the determination online after an examination?

The correct answer indicates that a medical examiner must submit the determination online by the close of the next calendar business day after completing an examination. This requirement ensures timely processing of medical certifications and allows the FMCSA to maintain up-to-date records on drivers' medical statuses, which is vital for road safety and compliance with federal regulations. Prompt submission helps facilitate the flow of information to licensing authorities and ensures that drivers receive their medical evaluations in a timely manner, reducing potential delays in operations.

While other options may seem reasonable, they do not adhere to the specific timeline set forth by the FMCSA for medical examiners. Submitting within the same week, within 24 hours, or at the end of the month could lead to delays and potential non-compliance with the regulations governing the medical certification process.