Published online by Cambridge University Press: 24 September 2025
DATA SUBJECTS AS DATA CONTROLLERS CONCERNING THE PROCESSING OF DATA RELATING TO THEMSELVES?
In order to allocate the responsibility to comply with legal requirements, the GDPR relies mainly on the notion of ‘(data) controller‘, defined as
’the natural or legal person, public authority, agency or other body which, alone or jointly with others, determines the purposes and means of the processing of personal data ; where the purposes and means of such processing are determined by Union or Member State law, the controller or the specific criteria for its nomination may be provided for by Union or Member State law‘ (emphasis added).
The data controller is the main person responsible for compliance with the GDPR. 1165 Where several controllers ‘jointly determine the purposes and means of processing‘, they are joint controllers and shall arrange their respective responsibilities for compliance between themselves, in a transparent manner and in a way that ‘duly reflects the respective roles and relationships [that they have] vis-à-vis the data subjects‘. Such an arrangement cannot be enforced against data subjects.
The GDPR regulates other roles, and in particular this of the ‘processor‘, defined as the person who processes personal data on behalf of the controller. 1167 Should the processor process data beyond the instructions given by the data controller, they would then qualify as a controller.
To save this book to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.