Which item must be included in the CMV DR-18 report if available?

• A. The date and nature of the offense
• B. The vehicle color
• C. The commercial driver's license number and social security number, if available
• D. The home address of the driver

Answer: (C)

Identifying the driver accurately in CMV incident reports relies on capturing unique identifiers that tie the record to the right person in licensing and enforcement databases. The item that must be included if available is the commercial driver's license number and, if available, the driver's social security number. The CDL number uniquely identifies the driver's CDL status and links to CDLIS records, while the SSN provides a federal-level identifier to verify identity when there are similarly named drivers or ambiguous records. Including these identifiers helps ensure the report goes to the correct driver file and supports proper enforcement actions. Other details like the date and nature of the offense, vehicle color, or home address can be useful, but they do not provide the same level of unique identification, and thus are not the must-have identifiers when available.