At the scene of a rollover, your shipping papers list UN1203 Gasoline. You grab the ERG to find the correct guide page. How is the ERG indexed to help you find the right orange-bordered guide page for this material?

AAMVA CDL Manual Sec 9.7.1 (nhcdm.pdf p.9-15); Emergency Response Guidebook (ERG)

Knowing how to navigate the ERG quickly — by shipping name or UN number — matters because the wrong guide page can lead to the wrong evacuation distance or firefighting approach for the material actually involved. Seconds matter at an incident scene, and fumbling through the book without knowing it's organized by material (not carrier or location) wastes critical time. This is also the exact kind of material-specific lookup skill the CDL hazmat knowledge test checks.