How many supporting documents must be retained by motor carriers, and when must drivers submit them to the motor carrier?

Motor carriers must retain up to eight supporting documents for every 24-hour period that a driver is on duty. Drivers must submit their records of duty status (RODS) and supporting documents to the motor carrier no later than 13 days after receiving them. If a motor carrier retains more than 8 supporting documents, the motor carrier must maintain the first and last document generated during the regular course of business.