At 18 May 2003, elections for both the Belgian House of Representatives and Senate were held within a new institutional framework: among others the constituencies were enlarged. The percentage of voters casting a preferential vote increased again, reaching the highest score ever with 66,5 %for the House and 68,0 %for the Senate. Voters can also cast a vote for several candidates figuring on the same party list, which was not done very frequently in the past. The number of preference votes on one ballot increased enormously, with naw on average 2,23 for the House and 2,37 for the Senate. More candidates than ever succeeded in becoming elected out of the order of the party list, which was mostly decisive in the past. The new electoral laws are one reason for these changes, togethers with some political and social evolutions, such as individualism, anti-party feelings and mediatisation.