what pages in the guidebook are ordered by id number
Emergency Response Guidebook The second section, with yellow page borders, references the material in order of its assigned 4-digit ID number/UN/NA number (which is often placarded with the other hazardous materials placards) and identifies the appropriate guide number to reference in the Orange Section). Items highlighted in green in this section will have evacuation distances included in the Green Section.
Tracking number A UPS tracking number, for domestic packages within the United States, will usually start with "1Z" followed by a 6 character shipper number (numbers and letters), a 2 digit service level indicator, and finally 8 digits identifying the package (the last digit being a check digit), for a total of 18 characters.[citation needed]