NCS Directive 3-1: Telecommunications Operations. Telecommunications Service Priority (TSP) System for National Security Emergency Preparedness (NS/EP) [open pdf - 43KB]
"This directive implements policy, explains legal and regulatory basis, assigns responsibilities, and prescribes procedures for the Telecommunications Service Priority (TSP) System for National Security and Emergency Preparedness (NS/EP)"
National Communications System Directive: NCS Directive 3-1
Telecommunications Service Priority: http://tsp.ncs.gov/docs.html