CFR › Title 46 › Part 160 › §160.028-546 CFR §160.028-5Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)General. Each signal pistol shall be permanently and legibly marked with its serial number, Coast Guard approval number, and the name and address of the manufacturer.(b)[Reserved]