What defines official correspondence as all written material addressed to or sent from a command?

Official correspondence is defined as all written material addressed to or sent from a command, and this definition is primarily outlined in OPNAVINST 3120.32 (Series). This instruction provides guidelines and procedures for the administration of commands, which includes how correspondence should be handled, formatted, and managed.

By establishing clear standards, OPNAVINST 3120.32 (Series) helps ensure consistency and clarity in communications across commands. This is critical for maintaining an official record of communication that can be referenced, audited, and used for accountability purposes.

The other options relate to different aspects of military records and procedures. The Records Disposal Act of 1943 focuses on requirements for the retention and destruction of governmental records, while SECNAV M-5210.1 serves as a guide to records management procedures specifically for the Department of the Navy. NAVPERS 1070/881 is a specific form used for personnel records rather than a broad directive for correspondence. Thus, OPNAVINST 3120.32 (Series) is the correct reference for defining what constitutes official correspondence.