Billing Code - PHMSA - Department of Transportation

FBCs must be transported in a conveyance with rigid sides and ends that extend at least
two-thirds the height of the FBC, must not be offered for transportation in freight
containers, and may not exceed 15 cubic meters in capacity.
Section 173.50
Section 173.50 provides definitions for the various divisions of Class 1 (explosives)
referenced in Subpart C of Part 173. Paragraph (b) of this section notes that Class 1
(explosives) are divided into six divisions. Division 1.6 is described as an explosive
consisting “of extremely insensitive articles that do not have a mass explosive hazard. This
division is comprised of articles that contain only extremely insensitive detonating
substances and that demonstrate a negligible probability of accidental initiation or
propagation.”
In this final rule, PHMSA is removing the word “detonating” from this definition to
align with the revised definition provided in the 17th Revised Edition of the UN Model
Regulations.
Section 173.56
Section 173.56 prescribes the definition of new explosives and provides explosive
(Class 1) classification and approval requirements. Paragraph (h) of § 173.56 states that
small arms ammunition, within certain parameters is not subject to the approval
requirements of the rest of §173.56.
PHMSA received a comment from SAAMI requesting that PHMSA amend
§ 173.56 to except Cases, cartridge, empty with primer and Cartridges for tools, blank
from the approval requirements of § 173.56. SAAMI noted that for Cartridges for tools,
blank the switch from UN 0323 to UN 0014 could necessitate new EX approvals for
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