Meta disputes that finding — and is appealing the enforcement — but a regulator-imposed three-month deadline to fix its GDPR compliance is looming early next month so it needs to do something to reset its claim of compliance in the meanwhile, i.e. while its army of lawyers try to figure out how to push water uphill. In its blog update about the upcoming switch, Meta wrote: In December, the Irish Data Protection Commission found that Facebook and Instagram must change their approach to the legal basis under GDPR for the purpose of serving behavioural advertisements in Europe. To comply, from Wednesday 5 April we are changing the legal basis that we use to process certain first party data in Europe from 'Contractual Necessity' to 'Legitimate Interests'.