Hazardous material must be shipped in ____ containers with proper labeling.

CLT teaches that hazmat packaging/containers must comply with U.S. DOT hazardous materials regulations (administered by PHMSA). In practice, training materials commonly reference “USDOT-approved” packaging that meets performance standards (e.g., UN specification packaging), correct closure instructions, and required markings/labels. FMCSA governs motor carrier operations, HAZCOM is a communication standard, and PHMSA is the DOT agency—but the compliance umbrella is USDOT hazmat rules.