Circulars contain material that is directive or informational, is transitory, or needs to be published only once. They apply throughout the agency or command. Each circular will have an expiration date that is not later than 2 years from the date of issue. A shorter expiration date will be used when the circular does not have to remain in effect for 2 years. Each circular will be limited to a single subject.
Pamphlets contain information, guidance, or reference material of a continuing nature.
Pamphlets will not be used to implement ARs at a lower level. Each memorandum will be confined to a single subject. This type of memorandum will be called an assignment memorandum and may be used when there is a large number of such assignments. Orders are directive or informational publications that contain personnel actions on military personnel. Announcements of promotions, dates of rank, basic service data determinations, and additional skill identifiers are combined into weekly extracts of orders.