1. High-risk AI systems which make use of techniques involving the training of AI models with data shall be developed on the basis of training, validation and testing data sets that meet the quality criteria referred to in paragraphs 2 to 5 whenever such data sets are used.
2. Training, validation and testing data sets shall be subject to data governance and management practices appropriate for the intended purpose of the high-risk AI system. Those practices shall concern in particular:
(a) the relevant design choices;
(b) data collection processes and the origin of data, and in the case of personal data, the original purpose of the data collection;
(c) relevant data-preparation processing operations, such as annotation, labelling, cleaning, updating, enrichment and aggregation;
(d) the formulation of assumptions, in particular with respect to the information that the data are supposed to measure and represent;
(e) an assessment of the availability, quantity and suitability of the data
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