What must be included on the face of a document when applying derivative classification by compilation?

When applying derivative classification by compilation, it is essential to include on the face of a document a clearly worded explanation of the basis for classification. This requirement ensures that readers understand the rationale behind the classification decision, which fosters accountability and transparency in the classification process. By providing a clear explanation, individuals who handle or review the document can discern how the information contained within it meets established classification criteria.

Including an explanation not only aids those who may be working with the document in the future but also supports compliance with regulatory requirements regarding the handling and dissemination of classified information. Proper documentation of the basis for classification helps minimize the risk of misinterpretation and misuse of sensitive information.

While other elements like a list of authorized personnel, an abstract of the document's subject matter, or the date of classification may be useful in specific contexts, they do not fulfill the core requirement of justifying why the information has been classified in the first place. Thus, the emphasis on providing a clearly worded explanation is paramount in derivative classification by compilation.