Driving time is federally limited, recorded electronically, and structured as a daily driving limit inside a longer on-duty window after a required rest period, with a weekly ceiling on top. That is why waiting at a dock costs money and not only patience: the clock runs regardless. Brokers operate under authority that requires a surety bond on file before they may broker at all. Cargo claims carry statutory acknowledgement and resolution windows, and detention is contractual rather than rate-regulated for domestic truckload, so what is owed comes from the agreement rather than from a rule. Carrier identity verification matters more here than in most sectors, because fraudulent re-brokering under a hijacked authority leaves the broker exposed.