For cargo that is accessible for inspection, when must its securement be rechecked after a trip begins?
Correct answer: B – Within 50 miles, then after a duty-status change or 3 hours or 150 miles, whichever occurs first
Federal cargo-inspection rules require an initial recheck within the first 50 miles. The driver must inspect again after a change of duty status or after driving 3 hours or 150 miles, whichever occurs first. California's handbook summarizes the same initial and periodic inspection schedule. Limited exceptions apply when cargo is sealed and the driver has been ordered not to open it or cannot inspect it.
Source: California Commercial Driver Handbook — § 2.1.6, “Inspection During a Trip”, 49 CFR § 392.9(b)(2)–(4) – Inspection of cargo, cargo securement devices and systems

