Who is responsible for approving all changes to Navy Regulations?

The Secretary of the Navy is indeed responsible for approving all changes to Navy Regulations. This responsibility includes reviewing proposed changes and ensuring that they align with the overall policies and operational needs of the Navy. The Secretary's role is critical in maintaining the integrity and relevance of the regulations, which govern the conduct and administration of naval personnel. This oversight helps ensure that the regulations are up-to-date and effectively support the mission of the Navy.

In this context, while the President of the United States holds ultimate authority over the military, including the Navy, the specific task of approving changes to Navy Regulations is delegated to the Secretary of the Navy. The Chief of Naval Personnel focuses more on personnel matters rather than regulatory changes, and the Commandant of the Marine Corps oversees the Marine Corps specifically, rather than the Navy as a whole. Therefore, the Secretary of the Navy is the appropriate authority for overseeing and approving modifications to Navy Regulations.