Regulatory decisons are typically based on expert input weighing the issues.
You have to rephrase that:
Regulatory decisions in europe are typically based on lobby group input weighing the issue. Expert input will only be included on external pressure.
Which is exactly what happened here. Until march 21st everybody could add their own comment or let himself be represented by an organization, for example ECA or his local trade union. Those comments will taken into consideration if they fit into the view of the relevant committee and their external experts (again, lobby groups) and a final version of the proposed legislation will be passed through the european commission and become binding european law.