Publications issued by a major command primarily apply to whom?

The correct answer is that publications issued by a major command primarily apply to the issuing command itself. This is because such publications are designed to provide specific guidance, policies, and procedures that are tailored to the needs, structure, and mission of the issuing command. They help ensure that operations are standardized and effective within that command's jurisdiction.

While publications might be used as references by other entities, their primary target audience is the units and personnel directly under the issuing command. This reflects the role of major commands in providing governance and operational support within the military.

The other options, while they may have relevance in broader contexts, do not accurately reflect the primary audience for these publications. The general public typically does not need access to such specialized military information. Affected units may utilize the publications, but they are ultimately designed with respect to the needs of the issuing command. Lastly, although publications can influence practices across military branches, they are specifically framed to cater to the requirements of the issuing command, making the command the main focus of the publications.