"It is DoD policy to protect nuclear weapons from loss, theft, sabotage, unauthorized use, and unauthorized or accidental damage or destruction. The policy in this Directive is provided for a peacetime environment. While adherence to prescribed security procedures during wartime may be impractical, particularly in a combat theatre, the same peacetime philosophy for protecting nuclear weapons remains in effect. However, in times of transition to war and during wartime, commanders are expected to use those resources available to them to provide security for weapons and to ensure their survivability. Security shall be considered early during the research, development, and acquisition of nuclear weapon systems and the modernization and updating of existing systems. DoD Components participating in the acquisition and development process shall provide a security concept of operations for new or modernized systems to the Under Secretary of Defense for Policy (USD(P)) for approval before the Milestone II/Full-Scale Development decision described in DoD Directive 5000.1 (reference (d)) and DoD Instruction 5000.2 (reference (e))."
DoD Directive 5210.41; DoDD 5210.41