How many levels of classification may appear in the banner line of a document?

The banner line of a classified document can contain two levels of classification to adequately communicate the sensitivity and handling requirements of the information contained within. This structure allows for clear identification of the overall classification level of the document and any additional compartments or special categories that may apply to specific portions of the document. For instance, the primary classification could indicate a high level of sensitivity, such as "Secret," while a second classification level may also indicate a controlled access need, like "NOFORN," which signifies that the information should not be shared with foreign nationals.

Using two levels enhances clarity for those who handle and read the document, ensuring that individuals are aware of all classification parameters while also enabling the protection of specific sensitive details. The mention of more than two classification levels is not standard practice for banner lines, as it would complicate the classification process and potentially create confusion about access and handling procedures.