CFR › Title 49 › Part 172 › §172.45049 CFR §172.450Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Each EMPTY label, except for size, must be as follows:(1)Each side must be at least 6 inches (152 mm.) with each letter at least 1 inch (25.4 mm.) in height.(2)The label must be white with black printing.(b)[Reserved]