Immediate - Precedence reserved generally for telephone calls pertaining to: E18.104.22.168.1. Situations that gravely affect the security of national and allied forces. E22.214.171.124.2. Reconstitution of forces in a post- attack period. E126.96.36.199.3. Intelligence essential to national security. E188.8.131.52.4. Conduct of diplomatic negotiations to reduce or limit the threat of war. E184.108.40.206.5. Implementation of Federal Government actions essential to national survival. E220.127.116.11.6. Situations that gravely affect the internal security of the United States. E18.104.22.168.7. Civil defense actions concerning the U.S. population. E22.214.171.124.8. Disasters or events of extensive seriousness having an immediate and detrimental effect on the welfare of the U.S. population. E126.96.36.199.9. Vital information having an immediate effect on aircraft, spacecraft, or missile operations. E188.8.131.52.