A political party is a free association of persons, one of the aims of which is to express the political will of citizens including through participation in public affairs and the presentation of candidates to democratic elections (CDL-AD(2010)024, para 26). The Venice Commission have already adopted a number of opinions and reports on issues concerning political parties (see the compilation CDL-PI(2016)003). They serve as helpful sources of references for regulating, inter alia, the establishment and registration of political parties. To avoid repetition, at this point, only a few selected requirements regarding the registration and membership of political parties are highlighted.