Except for matters relating to finances or budget or matters that are reg-ulated by a majority of two thirds of the votes cast, matters attributed exclu-sively to regional bodies can be the subject of a referendum in the Region concerned.
The rule referred to in Article 134 determines the procedures and arrange-ments for the referendum, and is adopted by a majority of two thirds of the votes cast, under the condition that the majority of the members of the Par-liament concerned is present. A law passed by a majority as described in Ar-ticle 4, last paragraph lays down additional majority requirements with re-spect to the Brussels-Capital Region.