33 C.F.R. § 149.120 What are the requirements for manually operated shutoff valves?
Title 33 - Navigation and Navigable Waters
Each oil and natural gas transfer line, passing through an SPM buoy, must have a manual shutoff valve on the buoy.
Title 33: Navigation and Navigable Waters
PART 149—DEEPWATER PORTS: DESIGN, CONSTRUCTION, AND EQUIPMENT
Subpart B—Pollution Prevention Equipment
§ 149.120 What are the requirements for manually operated shutoff valves?

