The discharge of oil within the waters of the United States is strictly prohibited as conveyed in the wording of the placard that is required to be displayed on board vessels by the __________.

The correct answer is rooted in the Federal Water Pollution Control Act (FWPCA), which is a vital piece of legislation in the United States aimed at regulating discharges of pollutants into the waters and ensuring the integrity of the nation’s water resources. The FWPCA establishes a framework for controlling water pollution and specifically addresses issues related to oil discharge in navigable waters, emphasizing the prohibition of such discharges to protect marine environments.

The placard that must be displayed on vessels serves as a critical reminder and legal notice to crew members and operators about the stringent regulations surrounding oil discharge. It typically includes language that clearly states the prohibition against discharging oil, thereby ensuring compliance with federal law and raising awareness about the environmental impact.

While the Coast Guard Regulations, the Maritime Safety Code, and NOAA play significant roles in maritime safety and environmental regulation, the specific statute that pertains directly to controlling oil discharges in U.S. waters is the FWPCA. Therefore, referencing the FWPCA is essential for understanding the legal obligations regarding oil discharge and the requirement for the placard on vessels.