What enforcement action involves formal notification of a violation?

The enforcement action that involves formal notification of a violation is a written warning. This action serves as a documented communication to the individual or entity regarding a specific violation, which outlines the nature of the offense and may delineate the potential consequences of continuing to violate the relevant laws or regulations.

Written warnings are important in the enforcement process because they provide a clear record that a violation has been identified and communicated. This documentation can be crucial for future enforcement actions, as it establishes a history of infractions and a clear message that compliance is expected. Additionally, providing a written warning allows the individual the opportunity to correct their behavior before facing more severe consequences like fines, penalties, or other enforcement actions.

In contrast, the other options represent different forms of enforcement actions or responses to violations that do not involve a formal notification process. For instance, voyage termination typically relates to halting a vessel's journey due to serious concerns, while seizure of evidence pertains to the confiscation of items related to a violation, and immediate arrest relates to detaining individuals who are committing offenses that pose an imminent threat or risk. These actions may occur without prior formal notice and do not serve specifically to inform the violator about a violation in the same structured manner as a written warning does.