33 C.F.R. § 159.61 Vents.
Title 33 - Navigation and Navigable Waters
Vents must be designed and constructed to minimize clogging by either the contents of the tank or climatic conditions such as snow or ice.
Title 33: Navigation and Navigable Waters
PART 159—MARINE SANITATION DEVICES
Subpart C—Design, Construction, and Testing
§ 159.61 Vents.
