49 CFR 173.144
Other Regulated Material (ORM)—Definitions.
Until December 31, 2020 and for the purposes of this subchapter, “ORM-D material” means a material such as a Consumer commodity, Cartridges, small arms, Cartridges, power devices ( used to project fastening devices ), Cartridges for tools, blank, and Cases, cartridge, empty with primer, which, although otherwise subject to the regulations of this subchapter, presents a limited hazard during transportation due to its form, quantity and packaging. The article or substance must be a material for which exceptions are provided in Column (8A) of the § 172.101 Hazardous Materials Table.
[78 FR 65481, Oct. 31, 2013]