46 C.F.R. § 78.47-53 Automatic ventilation dampers.
Title 46 - Shipping
(a) The manual operating positions for automatic fire dampers in ventilation ducts passing through main vertical zone bulkheads shall be identified by red day light-reflecting letters at least (b) [Reserved] [CGFR 65–50, 30 FR 16955, Dec. 30, 1965, as amended by 67–87, 32 FR 19181, Dec. 20, 1967]
Title 46: Shipping
PART 78—OPERATIONS
Subpart 78.47—Markings for Fire and Emergency Equipment, Etc.
§ 78.47-53 Automatic ventilation dampers.
