Many of our clients and client associates regularly seek us to clarify and to
explain the Homeland Security Advisory System. As such, we wanted to make
this available to others who may have the same uncertainty as to how the system
works and what the varying color ratings mean.

The Homeland Security Advisory System shall be binding on the executive
branch and suggested, although voluntary, to other levels of government and the
private sector. There are five Threat Conditions, each identified by a
description and corresponding color. From lowest to highest, the levels and
colors are:
Low = Green;
Guarded = Blue;
Elevated = Yellow;
High = Orange;
Severe = Red.
The higher the Threat Condition, the greater the risk of a terrorist attack.
Risk includes both the probability of an attack occurring and its potential
gravity. Threat Conditions shall be assigned by the Attorney General in
consultation with the Assistant to the President for Homeland Security. Except
in exigent circumstances, the Attorney General shall seek the views of the
appropriate Homeland Security Principals or their subordinates, and other
parties as appropriate, on the Threat Condition to be assigned. Threat
Conditions may be assigned for the entire Nation, or they may be set for a
particular geographic area or industrial sector. Assigned Threat Conditions
shall be reviewed at regular intervals to determine whether adjustments are
warranted.
For facilities, personnel, and operations inside the territorial United
States, all Federal departments, agencies, and offices other than military
facilities shall conform their existing threat advisory systems to this system
and henceforth administer their systems consistent with the determination of the
Attorney General with regard to the Threat Condition in effect.
The assignment of a Threat Condition shall prompt the implementation of an
appropriate set of Protective Measures. Protective Measures are the specific
steps an organization shall take to reduce its vulnerability or increase its
ability to respond during a period of heightened alert. The authority to craft
and implement Protective Measures rests with the Federal departments and
agencies. It is recognized that departments and agencies may have several
preplanned sets of responses to a particular Threat Condition to facilitate a
rapid, appropriate, and tailored response. Department and agency heads are
responsible for developing their own Protective Measures and other antiterrorism
or self-protection and continuity plans, and resourcing, rehearsing,
documenting, and maintaining these plans. Likewise, they retain the authority to
respond, as necessary, to risks, threats, incidents, or events at facilities
within the specific jurisdiction of their department or agency, and, as
authorized by law, to direct agencies and industries to implement their own
Protective Measures. They shall continue to be responsible for taking all
appropriate proactive steps to reduce the vulnerability of their personnel and
facilities to terrorist attack. Federal department and agency heads shall submit
an annual written report to the President, through the Assistant to the
President for Homeland Security, describing the steps they have taken to develop
and implement appropriate Protective Measures for each Threat Condition.
Governors, mayors, and the leaders of other organizations are encouraged to
conduct a similar review of their organizations= Protective Measures.
The decision whether to publicly announce Threat Conditions shall be made on
a case-by-case basis by the Attorney General in consultation with the Assistant
to the President for Homeland Security. Every effort shall be made to share as
much information regarding the threat as possible, consistent with the safety of
the Nation. The Attorney General shall ensure, consistent with the safety of the
Nation, that State and local government officials and law enforcement
authorities are provided the most relevant and timely information. The Attorney
General shall be responsible for identifying any other information developed in
the threat assessment process that would be useful to State and local officials
and others and conveying it to them as permitted consistent with the constraints
of classification. The Attorney General shall establish a process and a system
for conveying relevant information to Federal, State, and local government
officials, law enforcement authorities, and the private sector expeditiously.
The Director of Central Intelligence and the Attorney General shall ensure
that a continuous and timely flow of integrated threat assessments and reports
is provided to the President, the Vice President, Assistant to the President and
Chief of Staff, the Assistant to the President for Homeland Security, and the
Assistant to the President for National Security Affairs. Whenever possible and
practicable, these integrated threat assessments and reports shall be reviewed
and commented upon by the wider interagency community.
A decision on which Threat Condition to assign shall integrate a variety of
considerations. This integration will rely on qualitative assessment, not
quantitative calculation. Higher Threat Conditions indicate greater risk of a
terrorist act, with risk including both probability and gravity. Despite best
efforts, there can be no guarantee that, at any given Threat Condition, a
terrorist attack will not occur. An initial and important factor is the quality
of the threat information itself. The evaluation of this threat information
shall include, but not be limited to, the following factors:
- To what degree is the threat information credible?
- To what degree is the threat information corroborated?
- To what degree is the threat specific and/or imminent?
- How grave are the potential consequences of the threat?
Threat Conditions and
Associated Protective Measures
The world has changed since September 11, 2001. We remain a Nation at risk to
terrorist attacks and will remain at risk for the foreseeable future. At all
Threat Conditions, we must remain vigilant, prepared, and ready to deter
terrorist attacks. The following Threat Conditions each represent an increasing
risk of terrorist attacks. Beneath each Threat Condition are some suggested
Protective Measures, recognizing that the heads of Federal departments and
agencies are responsible for developing and implementing appropriate
agency-specific Protective Measures:
- Low Condition (Green). This condition is declared when there is a
low risk of terrorist attacks. Federal departments and agencies should
consider the following general measures in addition to the agency-specific
Protective Measures they develop and implement: