Which regulation governs uniform regulations in the Navy?

NAVPERS 15665I is the correct regulation that governs uniform regulations in the Navy. This instruction provides the policies, responsibilities, and procedures for wearing the Navy uniform, ensuring that all personnel adhere to a consistent standard. It includes information on uniform types, wear, grooming standards, and insignia, which are key elements in maintaining professionalism and discipline within naval service.

The other options relate to different aspects of Navy regulations. NAVPERS 15600A is focused on the Naval Reserve policy, while NAVPERS 15850F covers Navy-wide medals and awards. NAVPERS 16200B deals with the authority and responsibility of the personnel in charge. These regulations serve different purposes and do not specifically address uniform standards and regulations.