Judgment_paragraph 51 · Hauptpersonalrat der Lehrerinnen und Lehrer beim Hessischen Kultusministerium v Minister des Hessischen Kultusministeriums (C-34/21)

51As is apparent from Article 1(1) of the GDPR, read in the light, inter alia, of recitals 9, 10 and 13, that regulation seeks to ensure the harmonisation of national legislation on the protection of personal data which is, in principle, complete. However, the provisions of that regulation make it possible for Member States to lay down additional, stricter or derogating national rules and leave them a margin of discretion as to the manner in which those provisions may be implemented (‘opening clauses’) (see, to that effect, judgment of 28 April 2022, Meta Platforms Ireland, C‑319/20, EU:C:2022:322, paragraph 57).