CFR › Title 46 › Part 169 › §169.74346 CFR §169.743Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkPortable magazine chests must be marked in letters at least 3 inches high: “PORTABLE MAGAZINE CHEST—FLAMMABLE—KEEP LIGHTS AND FIRE AWAY.”