AR 25-400-2 governs the Army Records Management Program, including recordkeeping, retention, disposition, and wartime and contingency operations records.
View AR 25-400-2 on armypubs.army.mil
It defines Army records, record media, active and inactive records, retention periods, transfers, and unscheduled records. It requires controls for electronic records, training, retention and disposal schedules, and preservation of permanent records.
Army records can be found in all media formats: paper, email, instant messaging, chat and text messages, telephone messages, voice mail messages, presentations, websites, social media, word processing documents, spreadsheets, and information systems. (paragraph 3-2)
The length of time a record must be kept (either in the office, system, or in off-site storage) before it is destroyed. (paragraph 3-2)
Unscheduled records Records that have not been approved by NARA for disposition. They may not be destroyed or deleted. (paragraph 3-2)
Approval by the Archivist is the only legal authority for the retention and disposal of all Army records. (paragraph 1-87)
Records disposition includes transfer to the AEA, retirement to FRCs, disposal of temporary records and accession of permanent records to NARA. (paragraph 6-1)