Which executive order regulates classified information?

E.O. 12065 is significant because it established a comprehensive framework for the classification and declassification of national security information in the United States. Issued in 1978, this executive order provided guidelines on how information should be classified based on its sensitivity to national security interests, including which officials had the authority to classify information and the procedures for challenging classification determinations.

This executive order aimed to strike a balance between the need for national security and the public's right to access government information. It set forth a standardized process for the classification of information, ultimately ensuring that only necessary information was kept classified while promoting greater transparency and accountability in the government’s handling of sensitive data. The provisions of E.O. 12065 laid the groundwork for subsequent policies and regulations surrounding classified information, influencing later executive orders and national security directives.

The other options do not pertain to the regulation of classified information, as they address different issues or arose in different contexts.