MSA.

The national body that EU Regulation 2019/1020 puts in charge of checking products sold in the EU against the rules covering them, and to order non-compliant stock off the market. It is the enforcement end of CE marking, EPR, and the rest of the EU product rules: the regulation states the requirement, the MSA is who turns up. A shop shipping into the bloc answers to the authority in the country of import, not to the text of the regulation alone.