Final answer:
Navy personnel in Joint/Unified Commands must receive authorization from a higher authority within their chain of command to wear distinctive command identification badges, as directed by the regulations established under the President's authority, who is the Commander in Chief.
Step-by-step explanation:
The authorization for Navy personnel assigned to Joint/Unified Commands to wear distinctive command identification badges comes from higher authority within their specific chain of command. In the context of military hierarchy, this usually means the operational command at a level which has been granted the authority to issue such permissions. Given that the President is the Commander in Chief of the Army and Navy, ultimately, it is the directives established under his authority that govern the regulations for uniform wear and distinctive insignias.
It is necessary to adhere to the rules for the government and regulation of the land and naval forces when issuing and wearing these badges. These rules ensure that the identification badges are worn in a manner that upholds the traditions and professionalism of the Navy. It should also be noted that the wearing of such badges is in line with expressing a service member’s identity and affiliation with a command, similar to the cultural tradition of tattooing to express personal and group identity as practiced by American sailors in World War II and other cultures around the world.