首都圈
All districts have an electoral threshold of 5%, except for Brussels-Halle-Vilvoorde and Leuven; all districts are monolingual, except for Brussels-Halle-Vilvoorde which encompasses both the 19 bilingual municipalities from the Brussels-Capital region and some 35 Dutch-speaking municipalities in Flemish Brabant, incl. 7 with language facilities for French-speakers.