(a) Requirement.--The Secretary shall administer the
Homeland Security Advisory System in accordance with this
section to provide advisories or warnings regarding the threat
or risk that acts of terrorism will be committed on the
homeland to Federal, State, local, and tribal government
authorities and to the people of the United States, as
appropriate. The Secretary shall exercise primary
responsibility for providing such advisories or warnings.
(b) Required Elements.--In administering the Homeland
Security Advisory System, the Secretary shall--
(1) establish criteria for the issuance and
revocation of such advisories or warnings;
(2) develop a methodology, relying on the criteria
established under paragraph (1), for the issuance and
revocation of such advisories or warnings;
(3) provide, in each such advisory or warning,
specific information and advice regarding appropriate
protective measures and countermeasures that may be
taken in response to the threat or risk, at the maximum
level of detail practicable to enable individuals,
government entities, emergency response providers, and
the private sector to act appropriately;
(4) whenever possible, limit the scope of each such
advisory or warning to a specific region, locality, or
economic sector believed to be under threat or at risk;
and
(5) not, in issuing any advisory or warning, use
color designations as the exclusive means of specifying
homeland security threat conditions that are the
subject of the advisory or warning.