Cast Submission Guide needs clarification and correction

This section from the Cast Submission Guide needs clarification and correction:

• People who appear only in still photographs can be included in filmography based on these guidelines:
• The content was created specifically for the title and they do receive an on screen credit: they should be credited as reflected on screen with the addition of a (credit only) attribute.
  • If they are not featured in the end credits: they should instead be submitted as Photographic Model in Miscellaneous crew with the addition of an (uncredited) attribute.
• If the content is not explicitly created for the title and they are credited: they should be listed with a (credit only) attribute.
• If they are not credited: they are not eligible for listing as a filmography item, but can be submitted as “Bio: Other Works” or “Title: Trivia” (as long as it adheres to our Trivia policies).
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• Most photographs are not created specifically for a title, but are archive photographs.  They, therefore, DO NOT USE photographic models.  Being mentioned by name or appearing in a photograph does not usually result in on-screen credit since there is no archive footage.  

If a person has no on-screen credit, but is mentioned by name or identified in an archival photograph, they should have the "reference-to-" keyword.

This is particularly a problem for documentaries, where on-screen credits are rare and limited.  Cast names, therefore, are usually listed "in order appearance" IF there's archival footage.  Otherwise, they should have the "reference-to-" keyword.

Someone else could perhaps state this more clearly than I have.