Without an ELD, a fleet won’t be able to record the HOS data needed to pass a roadside inspection. The ELD mandate went into full effect back on December 16, 2019. Today, almost all commercial motor vehicles operating in the US need ELDs in order to avoid fines. Failure to provide a record of duty status can result in a vehicle being placed out of service for ten hours, and the violation will be registered on that operation’s Safety Measurement System scores.