What authority publishes the minimum standards and specifications for storing classified material?

The correct authority that publishes the minimum standards and specifications for storing classified material is the General Services Administration (GSA). The GSA is responsible for ensuring that federal agencies adhere to appropriate security standards when managing classified information. This includes the establishment of regulations and guidelines pertaining to the physical security of classified materials, including storage solutions.

The GSA's role in this context ensures that all governmental entities have a unified standard to follow, enhancing the safety and security of sensitive information across various departments. The standards set forth by the GSA help to mitigate risks associated with the storage and handling of classified materials, making it critical for agencies to comply with these guidelines to maintain national security.

While the Department of Defense, National Security Agency, and Office of Management and Budget play significant roles in national security and government operations, their focus areas differ substantially from the specific charter of the GSA regarding standards for classified storage. Thus, the GSA is the authoritative body pertaining to these specifications.