Factors for assignment of Threat Conditions. The Homeland Security Advisory System will provide a framework for the Attorney General, in consultation with the Director of the Office of Homeland Security, to assign Threat Conditions, which can apply nationally, regionally, by sector or to a potential target. Cabinet Secretaries and other members of the Homeland Security Council will be consulted as appropriate. A variety of factors may be used to assess the threat. Among these:

• Is the threat credible?
• Is the threat corroborated?
• Is the threat specific and/or imminent?
• How grave is the threat?

Unified system for public announcements. Public announcements of threat advisories and alerts help deter terrorist activity, notify law enforcement and State and local government officials of threats, inform the public about government preparations, and provide them with the information necessary to respond to the threat. State and local officials will be informed in advance of national threat advisories when possible. The Attorney General will develop a system for conveying relevant information to Federal, State, and local officials, and the private sector expeditiously. Heightened Threat Conditions can be declared for the entire nation, or for a specific geographic area, functional or industrial sector. Changes in assigned Threat Conditions will be made when necessary.

A tool to combat terrorism. Threat Conditions characterize the risk of terrorist attack. Protective Measures are the steps that will be taken by government and the private sector to reduce vulnerabilities. The HSAS establishes five Threat Conditions with associated suggested Protective Measures:

Low risk of terrorist attacks. The following Protective Measures may be applied:

• Refining and exercising preplanned Protective Measures
• Ensuring personnel receive training on HSAS, departmental, or agency-specific Protective Measures; and
• Regularly assessing facilities for vulnerabilities and taking measures to reduce them.

General risk of terrorist attack. In addition to the previously outlined Protective Measures, the following may be applied:

• Checking communications with designated emergency response or command locations;
• Reviewing and updating emergency response procedures; and
• Providing the public with necessary information.

Significant risk of terrorist attacks. In addition to the previously outlined Protective Measures, the following may be applied:

• Increasing surveillance of critical locations;
• Coordinating emergency plans with nearby jurisdictions;
• Assessing further refinement of Protective Measures within the context of the current threat information; and
• Implementing, as appropriate, contingency and emergency response plans.

High risk of terrorist attacks. In addition to the previously outlined Protective Measures, the following may be applied:

• Coordinating necessary security efforts with armed forces or law enforcement agencies;
• Taking additional precaution at public events;
• Preparing to work at an alternate site or with a dispersed workforce; and Restricting access to essential personnel only.

Severe risk of terrorist attacks. In addition to the previously outlined Protective Measures, the following may be applied:

• Assigning emergency response personnel and pre-positioning specially trained teams; Monitoring, redirecting or constraining transportation systems;
• Closing public and government facilities; and
• Increasing or redirecting personnel to address critical emergency needs.

Written comments may be sent to: Director, Federal Bureau of Investigation, Homeland Security Advisory System, Room 7222, 935 Pennsylvania Avenue, N.W. Washington, D.C. 20535. Comments may also be submitted electronically to: HSAScomments@fbi.gov