Which entity primarily oversees the classification process at the national level?

The oversight of the classification process at the national level is primarily responsible to the Intelligence Community. This entity includes various agencies that are specially tasked with handling sensitive national security information and ensuring its protection. The Intelligence Community's involvement is essential because it is responsible for both the classification and protection of classified information, aligning with national security needs and interests.

Additionally, the Intelligence Community plays a crucial role in the establishment of protocols and guidelines that govern how information is classified and declassified across other government agencies. The involvement of this community ensures that there is a cohesive and comprehensive strategy for managing classified information, which is vital for national security and intelligence operations. Other entities, while they may have roles in specific aspects of classification, do not primarily oversee the process in its entirety.