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.
(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 and, until December 31, 2020, a package of ORM-D material authorized by this subchapter on October 1, 2010, when offered for transportation by highway, rail or vessel.
(4) Category B infectious substances prepared in accordance with § 173.199.