49 CFR 172.200
Applicability.
(a)Description of hazardous materials required. Except as otherwise provided in this subpart, each person who offers a hazardous material for transportation shall describe the hazardous material on the shipping paper in the manner required by this subpart.#
(b)This subpart does not apply to any material, other than a hazardous substance, hazardous waste or marine pollutant, that is—#
(1)Identified by the letter “A” in column 1 of the § 172.101 table, except when the material is offered or intended for transportation by air; or#
(2)Identified by the letter “W” in column 1 of the § 172.101 table, except when the material is offered or intended for transportation by water; or#
(3)A limited quantity package unless the material is offered for transportation by aircraft or vessel.#
(4)Category B infectious substances prepared in accordance with § 173.199.#