StacksVerified U.S. regulatory reference

49 CFR §397.15

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
When a motor vehicle which contains hazardous materials is being fueled—
  1. (a)Its engine must not be operating; and
  2. (b)A person must be in control of the fueling process at the point where the fuel tank is filled.