(171) Affected persons should have the right to obtain an explanation where a deployerdeployermeans a natural or legal person, public authority, agency or other body using an AI system under its authority except where the AI system is used in the course of a personal non-professional activityArticle 3(4)’s decision is based mainly upon the output from certain high-risk AI systems that fall within the scope of this Regulation and where that decision produces legal effects or similarly significantly affects those persons in a way that they consider to have an adverse impact on their health, safety or fundamental rightsfundamental rightsIncludes human dignity, right to life, prohibition of torture, protection of personal datapersonal dataAny information relating to an identified or identifiable natural person ('data subjectsubjectfor the purpose of real-world testing, means a natural person who participates in testing in real-world conditionsArticle 3(58)data subjectsubjectfor the purpose of real-world testing, means a natural person who participates in testing in real-world conditionsArticle 3(58)An identified or identifiable natural person to whom personal data relateGDPR Art. 4(1)'). Includes name, ID number, location data, online identifiers, or factors specific to physical, physiological, genetic, mental, economic, cultural or social identityGDPR Art. 4(1), freedom of expression, non-discrimination, equality between women and men, rights of the child, right to an effective remedy and fair trialCharter of Fundamental Rights Art. 1–54. That explanation should be clear and meaningful and should provide a basis on which the affected persons are able to exercise their rights. The right to obtain an explanation should not apply to the use of AI systems for which exceptions or restrictions follow from Union or national law and should apply only to the extent this right is not already provided for under Union law.