Which document provides guidance for the DoD Shelf-Life Program?

The correct answer is DoD Instruction 4140.27, as this document outlines the policies and responsibilities associated with the DoD Shelf-Life Program. It serves as an official directive that establishes the framework and requirements for managing shelf life throughout the Department of Defense, ensuring that items are safe and suitable for use.

DoD Instructions are fundamental publications that provide detailed guidance on implementing departmental policies. In this context, Instruction 4140.27 specifically addresses how to track and manage the shelf life of items, which is critical for maintaining readiness and logistical efficiency within the military.

Other options, such as a handbook, regulation, or policy, may provide supportive information or context but do not serve the same directive purpose as an instruction. Handbooks typically offer supplementary guidance, while regulations imply legal requirements that are enforced but do not specifically define the procedural aspects of the Shelf-Life Program. Policies might set out the overarching goals but lack the specific implementation guidance present in an instruction. Thus, the instruction is the appropriate document that provides the necessary guidance for the DoD Shelf-Life Program.