What date does the new document supersede?

The correct choice indicates that the new document supersedes one that was issued on May 20, 2014. This means that the rules, guidelines, or information contained in the new document replace those outlined in the previous one dated May 20, 2014. It is common in documentation systems to indicate a specific date that a new version takes effect, establishing that all prior versions are no longer valid.

Understanding the significance of superseding documents is crucial, as it ensures that operators are consistently working with the most current and relevant information. Utilizing the most up-to-date documents helps maintain compliance with industry standards and regulations, reducing the risk of referencing outdated procedures that could lead to operational errors.

The context of the other options shows that neither May 14, 2015, nor June 1, 2015, nor the indication of "no previous documents" aligns with the specifics of document management, ensuring clear and effective communication among operating procedures and the established timeline.