The European Commission is the organisation in Brussels that drafts the laws.
It consists of 25,000 permanent officials who come from the member states in numbers that are roughly proportional to the size of the member state. It is headed by a college of 27 Commissioners, one from each member state. One of these is the President of the Commission. Each commissioner is responsible for one or more of the 36 directorates-general and services such as agriculture, consumer affairs, transport, the environment, trade.
Besides drawing up laws the Commission is also responsible for ensuring that laws are applied in the member states. If member states don’t apply the law the Commission takes them to the Court of Justice that may impose penalties if it finds member states guilty.
The Commission also manages the Common Fisheries Policy and is responsible for the laws of competition as they apply to business.
