Sections 89 and 90 of the Data (Use and Access) Act (c. 18) (“the DUAA”) amend the Data Protection Act 2018 (c. 12) (“the DPA”) to enable joint processing between qualifying competent authorities and intelligence services, under Part 4 of the DPA. This enables the controllers, previously unable to process jointly, to process personal data within a single, common regime. The controls and safeguards under Part 4 of the DPA will apply to all such joint processing. Section 89(2) of the DUAA amends section 82 of the DPA, widening the scope of Part 4 of the DPA. Previously, Part 4 of the DPA only applied to processing by or on behalf of the intelligence services. As amended, section 82 also applies Part 4 of the DPA to the processing of personal data by a qualifying competent authority where the processing is the subject of a designation notice. Section 89(2) of the DUAA inserts new subsection (2A) into section 82 of the DPA, which grants a power to the Secretary of State to make regulations to specify and describe which competent authorities (as defined in section 30 of the DPA) are “qualifying competent authorities”, and so able to apply for or be issued with a designation notice.