Complex sentence: Each Item (1-6) in s 187AA specifying particular types of data that can be retained was then assessed for its compatibility with Article 17 of the ICCPR, and each Item was considered reasonable, proportionate and necessary to criminal and national security investigations.
Split into simpler sentences: Each Item (1-6) in s 187AA was then assessed for its compatibility with Article 17 of the ICCPR. Similar reasoning was extended to the other Items (2,3,5 and 6) under s 187AA, and were all considered reasonable, proportionate and necessary to criminal and national security investigations.