> For the complete documentation index, see [llms.txt](https://documentations.seclea.com/ec-aia-compliance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentations.seclea.com/ec-aia-compliance/article-12-record-keeping-art12/12.04-logging-biometric-systems-requirements.md).

# 12.04 - Logging - Biometric Systems Requirements

For high-risk AI systems intended to be used for the ‘real-time’ and ‘post’ remote biometric identification of natural persons shall provide, at a minimum ([12.04](/ec-aia-compliance/article-12-record-keeping-art12/12.04-logging-biometric-systems-requirements.md)):

1. Recording of the period of each use of the system (start date and time and end date and time of each use);
2. The reference database against which input data has been checked by the system;
3. The input data for which the search has led to a match;
4. The identification of the natural persons involved in the verification of the results, as referred to in Article 14 (5).