Constituents who have residency in Hungary, but work or study abroad for a prolonged period of time, and consequently are not going to be in Hungary on the day of the parliamentary elections, may only vote at the foreign embassies. In certain cases, this might necessitate a journey of several hundred kilometres, and entail considerable costs, or even prevent them from voting. At the same time, constituents who are going to stay abroad on the day of the election as well, but who do not have residency in Hungary, can vote by post, which is cheap, simple and convenient. HCLU, representing a constituent working abroad, has contested these discriminative rules at the Constitutional Court.