The separation of powers, this reality which dominates the constitutional order beginning with the modern era, conveys through structures, institutions and methods, the relations that exist and should exist between the power and those commissioned to exercise the power, with the aim of establishing reasonable correlations between the governed and the governance according to the public liberties. The separation of powers principle gained ground in people's mind only when they felt the constitutional regime should be installed. It was so important on the European and American continents, that creating democratic societies without it would have been out of discussion. And when along with the constitutional regime, they reached to the idea of a state of law, the separation of powers principle was considered the only method able to form it.