The federalisation of Belgium causes a new division of taxing competances between the federal and the regional gouvernments. So far, the future role of local tax-authorities has not been taken into consideration. this study means to envolve the topic of local tax-authorities has not been taken into consideration. This study means to envolve the topic of local taxes in the discussion concerning wich tax should be levied by what authority, and tries to adapt the local taxation to the needs of the 21st century.