46 C.F.R. § 108.633 Fire stations.
Title 46 - Shipping
Each fire station must be identified by marking: “FIRE STATION NO. __;” next to the station in letters and numbers at least 5 centimeters (2 inches) high.
Title 46: Shipping
PART 108—DESIGN AND EQUIPMENT
Subpart G—Equipment Markings and Instructions
§ 108.633 Fire stations.