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This Practice Note is archived and no longer maintained. It explained the scope of the power to retain communications data under Part 4 of the Investigatory Powers Act 2016 (IPA 2016) which provides for the retention of communications data by telecommunications and postal operators so it is available for subsequent access by public authorities when authorised under IPA 2016. It explains when review by the Secretary of State is required, how retention notices can be varied or revoked, the extraterritorial application of IPA 2016, Pt 4 and identifies some on the key cases challenging the power to require the retention of communications data under IPA 2016.

This Practice Note has been archived and is not maintained. It explained the background to the introduction of the Investigatory Powers Act 2016 (IPA 2016). . It provided an overview of the IPA 2016; a summary of the various reviews of the pre-existing regimes for the collection and retention of communications data under the Regulation of Investigatory Powers Act 2000 (RIPA 2000) and the Data Retention and Investigatory Powers Act 2014 (DRIPA 2014) which led to IPA 2016 being passed.