The rise of referendums has led to the concern that they could lead to liberticide and discriminatory results. This article intends to determine whether the concept of popular sovereignty would immunize constitutional provisions that are passed through a constitutional referendum from any human rights limitation. In answering the question, I formulate a theoretical framework called “constituent-constituted duality,” while also distinguishing “the constituent people,” which is mythical, and “the constituted people,” which is empiric. In the end, this article argues that the only possible form of limitation from the perspective of popular sovereignty is an ex ante limitation. Meanwhile, an ex post facto limitation remains unacceptable from the angle of popular sovereignty, which implies that a judicial review of popularly-enacted constitutional amendments is conceptually illegitimate.

The European citizens' initiative (ECI) is a new device of participatory democracy, which has its own characteristics, unknown to date at any level of national or trans-national government. It is designed to allow the citizens to take an active role within the law-making process of the EU. The specific features of this process affect the legal nature as well as the functioning of the new participatory device. Both will depend strongly on the European law, which shall determine the procedures and conditions required for the ECI.