A lead assessor is reviewing the data flow diagram of a mobile banking application. The diagram shows that the user's precise geolocation data is sent to a third-party marketing analytics provider to 'personalize offers'. This specific data flow and purpose was not disclosed in the customer-facing privacy notice. This is a direct contravention of which core privacy principle, central to the DAF-P assessment? ```mermaid graph TD A[Mobile App on User Device] -- Geolocation Data --> B(Third-Party Marketing Analytics) A -- Transaction Data --> C{Bank's Core Processing System} C --> D[Bank's Internal Analytics] ```