Article 63

The House of Councillors shall comprise at least 90 members and at most 120, elected by indirect universal suffrage for six years, according to the following distribution: - three fifths of the members representing the territorial collectivities. This number shall be distributed among the regions of the Kingdom in proportion to their respective populations and observing equity among the regions. The third reserved for the region shall be elected at the level of each region by the Regional Council from among its members. The remaining two thirds shall be elected by an electoral college constituted at the level of the region by the members of the communal, prefectural and provincial councils; - two fifths of the members elected in each region by electoral colleges composed of elected representatives of the professional chambers and of the most representative professional employers' organizations, and of members elected at the national level by an electoral college composed of representatives of employees. The number of members of the House of Councillors and their electoral system, the number of those to be elected by each of the electoral colleges, the distribution of seats by region, the conditions of eligibility and the cases of incompatibility, the rules limiting the cumulation of mandates, as well as the organization of electoral disputes, shall be fixed by an organic law. The President of the House of Councillors and the members of the Bureau, as well as the presidents of the permanent Commissions and their bureaux, shall be elected at the beginning of the legislature, then at the end of half of the legislature. The election of the members of the Bureau shall be by proportional representation of the groups.