text: FM 2.22.3 _________________________________________________________________________________
  which will be marked “CRIMINAL EVIDENCE.” Such documents will
  be kept separate from other documents and will be stored under guard
  or in a secure area until turned over to a war crimes investigative unit.
  SJA should be consulted concerning chain of custody requirements.
  Category B
  I-30.Category B documents contain information of intelligence interest to the
  supported command. The lowest echelon possible exploits the documents and
  evacuates them through intelligence channels. Category B documents are
  handled as SECRET.
  Category C
  I-31.Category C documents and items contain no information of intelligence
  interest but still require special administrative accountability (for example,
  currency, works of art, narcotics). Currency is accounted for on DA Form
  4137 (Evidence/Property Custody Document).
  Category D
  I-32.Category D documents contain no information of intelligence value.
  Only the theater or higher document repository can categorize documents as
  Category D.
  GROUP DOCUMENTS
  I-33.CEDs are first grouped according to their assigned screening category.
  Personnel must be careful when sorting CEDs to ensure no CED is separated
  from its associated documents. These large groupings can be broken down
  into smaller groups. Each of these smaller groupings consists of CEDs that
  were—
  • Captured by the same unit.
  • Captured in the same place.
  • Captured on the same day at the same time.
  • Received at the DOCEX element at the same time.
  TRANSMITTAL OF CEDS FROM FIRST AND SUBSEQUENT MI UNITS
  I-34.Unless they have an HCT in DS, most units that capture or find
  documents normally have no way of evaluating, categorizing, or otherwise
  differentiating documents. They are all tagged and evacuated together by the
  most expedient means through MI channels. Once these documents arrive at
  a HUMINT collection or DOCEX unit, the unit can screen, categorize, and
  extract information from the documents. The degree that documents are
  exploited at each echelon is dependent on mission priorities and available
  resources. Document handlers must note any attempts to exploit CEDs on
  the transmittal documents to prevent unnecessary duplication of effort by
  higher echelons.