The European Parliament is the only supranational institution in the world that is directly elected by citizens. Due to this legitimacy, it has been entrusted with steadily increasing responsibilities in recent years. To manage these new tasks, it is essential for the Parliament to have the internal structures necessary to remain effective. This study therefore focuses on the functional law of the European Parliament, meaning all norms that more precisely define the actions of the European Parliament for the purpose of achieving the objectives of the treaties. The work critically examines the existing norms of functional law and investigates which reforms need to be pursued from a legal and political perspective for the future.