Shelf-life code (SLC) is assigned to most what?

Shelf-life code (SLC) is predominantly assigned to National Stock Numbers (NSNs) because NSNs represent the unique identifier for items within the U.S. supply chain that are procured, stocked, and managed by the Department of Defense. Each NSN is associated with specific characteristics of the item, including its shelf life, which indicates the period during which it can be stored and still remain usable for its intended purpose. In the context of supply chain management, the SLC provides critical information for inventory control, ensuring that items are rotated appropriately and that expired items are discarded in compliance with safety and operational readiness standards. Other options, such as inventory management codes, item numbers, and storage locations, do not universally designate shelf-life information like NSNs do, making them less relevant in this specific context.