Which entity provides guidance on the compilation basis for classified information?

The Original Classification Authority (OCA) is responsible for establishing the classification status of information based on its sensitivity and potential impact if disclosed. The OCA has the authority to determine what information requires protection and under what classification level it should be marked, which is crucial for maintaining national security. This guidance is essential to ensure that classified information is handled appropriately according to established standards, thus providing a consistent framework for classification across various agencies and departments.

In contrast, while the Security Review Board, the Intelligence Community, and the Department of Defense all play roles in the broader context of information security and classification processes, they do not provide the fundamental guidance on which specific information should be classified and how it should be compiled. The OCA is distinct in its direct authority to designate classification based on content and sensitivity.