Key 1, the "PACKAGES" block, lists the number and kinds of packages
in the cargo.
Key 2, the "DESCRIPTION OF ARTICLES" block, lists
standard, in-the-clear descriptions of the cargo.
Key 3, the
"NUMBERS ON PACKAGES" block, lists the numbers appearing on each
piece of cargo if there is more than one piece in a shipment. Key 4,
the "WEIGHTS" block, lists the weight of each package and the cubic
measurements of each package where required.
Hazardous cargo may be identified in the "DESCRIPTION OF ARTICLES"
block (Key 2) by an in-the-clear description or by a United Nations
North American hazardous materials identification number. The United
Nations
North
American
hazardous
identification
number
is
a
universally accepted standard of identifying hazardous materials by
the type of hazards they represent to property and personnel.
The
identification numbers are matched to descriptions of the hazards in
Section 172.101 of CFR 49.
Section 172.101 cross-references United
Nations identification numbers with other parts of Section 172 that
describe the different hazards. Pages from Section 172.101 appear in
Appendix B. To find a description of an item you must--
locate the Identification Number symbol in column 1.
note the part of Section 172 that describes the hazardous
material involved. This information appears in column 2.
turn to the appropriate part of Section 172 for a description
of the hazards involved with that material.
The hazards description usually appears on the GBL; however, if only
the UN identification number appears, consult Section 172.102 in
Appendix B.
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