46 U.S.C. § 3719: Reduction of oil spills from single hull non-self-propelled tank vessels

A crew member and an operable anchor on board the tank vessel that together are capable of arresting the tank vessel without additional assistance under reasonably foreseeable sea conditions. An emergency system on the tank vessel or towing vessel that without additional assistance under reasonably foreseeable sea conditions will allow the tank vessel to be retrieved by the towing vessel if the tow line ruptures. Any other measure or combination of measures that the Secretary determines will provide protection against grounding of the tank vessel comparable to that provided by the measures described in paragraph (1) or (2).