Which Army regulation pertains to supply policy below the national level?

The correct choice pertains to AR 710-2, which specifically addresses supply policy below the national level. This regulation outlines how supply operations are to be conducted within units, focusing on the management of supplies and equipment at the local level rather than at the broader national or strategic level. It includes guidance on the requisition, storage, and distribution of supplies, ensuring that units can effectively manage their logistical needs within the framework established by higher headquarters.

In contrast, other regulations mentioned do not focus on supply policy. For instance, AR 190-51 deals with the security of Army personnel and property. Meanwhile, AR 300-1 pertains to the Army’s training policies and guidance, and AR 190-11 addresses physical security of sensitive and classified material. This distinction is crucial for understanding the role of supply specialists in managing supplies effectively and ensuring unit readiness.