Processing is lawful only if at least one basis applies: consent for specific purposes, contract with the data subject, legal obligation, vital interests, a public task laid down in domestic law or relevant international law (section 9A of the 2018 Act), a recognised legitimate interest, or legitimate interests not overridden by the data subject's interests, rights and freedoms (particularly where the data subject is a child). Neither legitimate-interest basis is open to public authorities performing their tasks. A recognised legitimate interest (Article 6(1)(ea)) applies only where a condition in Annex 1 is met: disclosure on request to a body that states it needs the data for a public task, national security, public security or defence, responding to an emergency, detecting or preventing crime or prosecuting offenders, and safeguarding a vulnerable individual (under 18, or 18 or over and at risk); no balancing test is required for these. Article 6(11) gives direct marketing, intra-group transmission for internal administration and network and information security as examples of processing that may be necessary for legitimate interests, which still need the balancing test.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.