Who must hold a safety permit?

Intrastate, interstate, and foreign carriers transporting any of the following hazardous materials in the quantity indicated must have a safety permit:

• A highway route-controlled quantity of Class 7 radioactive material, as defined in 173.403;
• More than 55 pounds net weight of a Division 1.1, 1.2, or 1.3 explosive materials or an amount of a Division 1.5 explosive materials requiring placarding;
• More than one liter (1.08 quarts) per package of a “material poisonous by inhalation,” as defined in 171.8, that meets the criteria for “hazard zone A,” as specified in 173.116(a) or 173.133(a);
• A “material poisonous by inhalation,” in a bulk packaging, that meets the criteria for “hazard zone B,” as specified in 173.116(a) or 173.133(a);
• A “material poisonous by inhalation,” that meets the criteria for “hazard zone C,” or “hazard zone D,” as specified in 173.116(a), in a packaging having a capacity equal to or greater than 3,500 gallons; or
• A shipment of compressed or refrigerated liquid methane or natural gas or other liquefied gas with a methane content of at least 85 percent, in a bulk packaging having a capacity equal to or greater than 13,248 L (3,500 gallons) for liquids or gases.