CJCSI 3125.01A, Military Assistance to Domestic Consequence Management Operations in Response to a Chemical, Biological, Radiological, Nuclear, or High-Yield Explosive Situation, Enclosure E, establishes a presumption that units deployed to sites of a CBRNE situation will not carry arms. Units may deploy to sites of CBRNE situations with their weapons in storage in the event that the unit is subsequently authorized to carry arms by the SecDef or is deployed from the CBRNE site to an assignment where weapons are authorized. Military commanders are responsible to ensure that weapons and ammunition are properly stored and physically secured. Military members providing security for stored weapons and ammunition at military facilities during CBRNE CM operations may carry their weapons while performing their normal security duties. In accordance with CJCSI 3121.01B, Standing Rules of Engagement/Standing Rules for the Use of Force for US Forces (S), mission-specific RUF for CBRNE CM operations are set forth in CJCS Contingency Plan (CONPLAN) 0500-98 (U), Annex C. National and local decisions about force protection conditions (FPCON) may have an impact on the arming policy. The decision to implement a particular FPCON is a command decision and the JTF commander may set a higher FPCON if warranted by threat level assessments for the joint operations area (JOA). FPCON is based on an assessment of the vulnerability of JTF personnel or facilities, criticality of personnel or facilities, availability of security resources, impact on operations and morale, damage control considerations, and other international or US actions. Because the CBRNE CM mission is most likely in response to a terrorist attack, it is highly likely that deterrent measures may include requesting SecDef authorization to arm the response forces along with taking other additional security measures based on local FPCON. (JCS/DOD, CBRNE CM, 2006, pp. II-4 and II-5; See also: Dept. of the Army, WMD-CST Operations, December 2007, p. A-1)