Purpose and applicability.

Link to an amendment published at 91 FR 49332, Aug. 4, 2026.#

(a)Purpose. This subpart prescribes requirements for development and implementation of plans to address security risks related to the transportation of hazardous materials in commerce.#

(b)Applicability. Each person who offers for transportation in commerce or transports in commerce one or more of the following hazardous materials must develop and adhere to a transportation security plan for hazardous materials that conforms to the requirements of this subpart. As used in this section, “large bulk quantity” refers to a quantity greater than 3,000 kg (6,614 pounds) for solids or 3,000 liters (792 gallons) for liquids and gases in a single packaging such as a cargo tank motor vehicle, portable tank, tank car, or other bulk container.#

(1)Any quantity of a Division 1.1, 1.2, or 1.3 material.#

(2)A quantity of a Division 1.4, 1.5, or 1.6 material requiring placarding in accordance with subpart F of this part.#

(3)A large bulk quantity of Division 2.1 material.#

(4)A large bulk quantity of Division 2.2 material with a subsidiary hazard of 5.1.#

(5)Any quantity of a material poisonous by inhalation, as defined in § 171.8 of this subchapter.#

(6)A large bulk quantity of a Class 3 material meeting the criteria for Packing Group I or II.#

(7)A quantity of desensitized explosives meeting the definition of Division 4.1 or Class 3 material requiring placarding in accordance with subpart F of this part.#

(8)A large bulk quantity of a Division 4.2 material meeting the criteria for Packing Group I or II.#

(9)A quantity of a Division 4.3 material requiring placarding in accordance with subpart F of this part.#

(10)A large bulk quantity of a Division 5.1 material in Packing Groups I and II; perchlorates; or ammonium nitrate, ammonium nitrate fertilizers, or ammonium nitrate emulsions, suspensions, or gels.#

(11)Any quantity of organic peroxide, Type B, liquid or solid, temperature controlled.#

(12)A large bulk quantity of Division 6.1 material (for a material poisonous by inhalation see paragraph (5) above).#

(13)A select agent or toxin regulated by the Centers for Disease Control and Prevention under 42 CFR part 73 or the U.S. Department of Agriculture under 9 CFR part 121.#

(14)A quantity of uranium hexafluoride requiring placarding under § 172.505(b).#

(15)International Atomic Energy Agency Code of Conduct (IBR, see § 171.7) Category 1 and 2 materials, Nuclear Regulatory Commission, Category 1 and Category 2 radioactive materials as listed in Table 1, appendix A to 10 CFR part 37, and Highway Route Controlled quantities as defined in 49 CFR 173.403.#

(16)A large bulk quantity of Class 8 material meeting the criteria for Packing Group I.#

(c)Exceptions. Transportation activities of a farmer, who generates less than $500,000 annually in gross receipts from the sale of agricultural commodities or products, are not subject to this subpart if such activities are:#

(1)Conducted by highway or rail;#

(2)In direct support of their farming operations; and#

(3)Conducted within a 150-mile radius of those operations.#