Final answer:
The Secretary of the Navy exercises overall management of the DON Directives Issuance System and provides for its implementation and administration within the Navy.
Step-by-step explanation:
The overall management of the DON Directives Issuance System and the implementation and administration within the Navy is handled by the Secretary of the Navy.
The Secretary of the Navy is a civilian official who is responsible for the organization and readiness of the U.S. Navy and Marine Corps.
By overseeing the DON Directives Issuance System, the Secretary of the Navy ensures that the Navy's policies, regulations, and instructions are issued and followed effectively.