United States Department of Homeland Security: Homeland Security Advisory Council Charter [open pdf - 15KB]
"The HSAC exists to provide organizationally independent advice and recommendations to the Secretary of the Department aiding in the creation and implementation of critical and actionable policy relating to the security of the American homeland. The HSAC shall periodically report, as appropriate, to the Secretary on matters within the scope of that function. The HSAC serves solely as an advisory body with the goal of providing advice predicated upon the request of the Secretary or the identification of issues of relevance and concern to the mission of the Department and the security of America."
Department of Homeland Security: http://www.dhs.gov/