The DIN EN 17169:2020-05 on tattoo hygiene was published in summer 2019! Stakeholers from tattoo societies, legal authorities, physicians and scientist agreed on this document aiming to give advice to tattooist, permanent make-up artists and legal inspectors on how to create a tattoo in a hygienic way. Although these are not (yet) legally binding, they surely will find their way into the tattoo studios and future legislations.
The Dutch authorities released some videos on how to comply with the CEN norm hygiene rules:
Cleaning and Disinfecting