Start with two separate decisions. First decide whether the service is offered directly to a child and relies on consent under Article 6(1)(a). Then decide whether any data falls into Article 9 categories such as health data, genetic data, biometric data used for unique identification, political opinions, religion, trade union membership, sex life, or sexual orientation.
Article 8 does not create a universal age gate for every child-related processing activity. It applies to consent for information society services offered directly to children. Its consent rule is also separate from Member State contract law on whether a child can form, validate, or be bound by a contract. Article 9 is broader: if a listed special category is processed, the team must identify a condition in Article 9(2) and keep the supporting law, consent record, safeguard, or operational evidence. Personal data about criminal convictions and offences is governed separately by Article 10, not treated as an Article 9 special category.
Biometric data is an Article 9 special category when it results from specific technical processing of physical, physiological, or behavioural characteristics and is used to allow or confirm unique identification. A photograph or voice recording is not automatically special-category biometric data, although it remains personal data when it relates to an identifiable person and another Article 9 category may still be revealed.