Unclassified Controlled Information (UCI) is information that cannot be classified for legal or operational reasons, but that is still sufficiently sensitive that its unauthorized dissemination is prohibited. UCI is protected through marking, access control, physical protection, and other requirements that restrict reproduction, transmission, destruction, and dissemination.

UCI includes, but is not limited to:

• DOE Official Use Only (OUO). Certain unclassified information that may be exempt from release under the Freedom of Information Act (FOIA) and has the potential to damage governmental, commercial, or private interests if disseminated to persons who do not need to know the information to perform their jobs or other DOE-authorized activities. While there are several categories of OUO information, one category requires special attention: Personally Identifiable Information (PII). PII is identified as OUO under FOIA exemption 6 and, as such, must not be released to anyone who does not have a legitimate need to know the information.

  PII includes:
  - An individual's social security number or date of birth
  - An individual's medical conditions or criminal history
  - Personnel matters in which administrative action, including disciplinary actions, may be taken
  - An employee's performance evaluation rating
  - An evaluation of a candidate for employment or security clearance

  If you have questions about the protection of PII, call the Office of the Chief Information Officer, (202) 586-0166.

• Unclassified Controlled Nuclear Information (UCNI). Certain unclassified but sensitive information concerning nuclear material, nuclear weapons, and their components the distribution of which is controlled under the Atomic Energy Act.
  
  
• Other-Agency Controlled Information is UCI created by other Agencies. Examples include Department of Defense information known as "For Official Use Only" (FOUO) and State Department information known as "Sensitive but Unclassified" (SBU). These other Agencies' UCI markings are equivalent to DOE's OUO markings, and documents with such markings must be protected.