What is the correct portion marking for a confidential paragraph in a derivative document?

In the context of derivative classification, the correct portion marking for a confidential paragraph in a document is "Confidential." This marking indicates that the information contained within that paragraph is classified at the confidential level, which is the lowest level of classified information recognized by the U.S. government. It is essential to apply appropriate classification markings to ensure proper handling and protection of sensitive information.

The term "Confidential" specifically denotes information that, if disclosed, could harm national security but does not fall under the more serious categories of "Secret" or "Top Secret." The use of this particular marking helps individuals who access the document quickly understand the level of sensitivity involved and the necessary precautions for safeguarding the information.

Other markings, such as "Restricted," do not align with formal classification categories recognized by government standards, and "Unclassified" would indicate that the information is not sensitive at all and requires no special handling. Additionally, "Secret" refers to a higher classification level and would not be appropriate for material designated as confidential. Thus, using "Confidential" ensures accurate and compliant communication of the document's sensitivity level.