During a roadside inspection, the emergency response telephone number on your shipping papers rings through to an answering machine that promises a callback later. Does this satisfy the shipping paper requirement?

49 CFR 172.604(a); AAMVA CDL Manual, Section 9.3.5 (nhcdm.pdf p. 9-7)

This is one of the ELDT Penalty Reference's cited real-world violations — a missing or non-monitored emergency number is cited around $1,600-$3,200 — because an answering machine during an actual spill or fire means first responders can't get the material-specific guidance they need fast enough to act safely.