Is there guidance on the type of documentation that is needed for relying on the “development” ‘releases’ under paragraphs (b)(4), (b)(5) and (b)(6)?

Yes. The Note to paragraphs (b)(4), (b)(5) and (b)(6) identifies the type of documentation required in order to rely on the “development” ‘releases.’ The Note to paragraphs (b)(4), (b)(5) and (b)(6) includes an illustrative list of such documents.