A rule in the National Motor Freight Classification of the motor common carriers containing requirements for corrugated and solid fiberboard boxes. Used for the specific rule, and sometimes for the series of related rules designated items 222, 222-1, 222-2, 222-3, 222-4, 222-5, and 222-6. It defines size and wight limitation, the strength of the fiberboard used, and the box manufacturer’s certificate (BMC) that must appear on all conforming boxes.
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