WAC 434-663-730
WAC 434-663-730. Header information on image files
An electronic imaging system containing public records with a retention period of ten years or longer or records containing archival information must use a nonproprietary file header format such as Tagged Image File Format (TIFF) or a header that complies with ANSI-AIIM MS53, File Format for Storage and Exchange of Images, or Bi-level File Format: Part 1.