ideological stance. Citizenship Since federalisation in 1968, Czechoslovakia had divided citizenship, either of the Czech Socialist Republic or of the Slovak Socialist Republic, the word Socialist being dropped from both names shortly after the Velvet Revolution. That distinction, however, had little effect on citizens' life. On January 1, 1993, all Czechoslovak citizens automatically became citizens either of the Czech Republic or the Slovak Republic, based on their previous citizenship, permanent residence address, birthplace, family ties, job and other criteria. Additionally, people had one year's time to claim the other citizenship under certain conditions. Slovak legislation allowed dual citizenship until 2010, when it was abolished (see Citizenship Act (Slovakia)). Only a handful of people have exercised that right, but its significance is lessened by both nations' membership in the EU as the freedom of movement for workers, a policy that guarantees EU citizens the right to work and to live anywhere in the Union. In the case of movement between the Czech Republic and Slovakia, the policy took effect from 2004. By contrast, the Czech Republic has prohibited dual citizenship for naturalized citizens and requires them to give up existing citizenship(s) prior to receiving citizenship of the Czech Republic. That requirement can be waived only if giving up an existing citizenship might put the applicant or their relatives in danger of persecution in their homeland, which was not the case of applicants from Slovakia. That situation changed with the new Citizenship Act of 2013 (186/2013 Sb.), in force since January 1, 2014. However, most Slovak citizens are still unable to become dual citizens of both the Czech Republic and Slovakia since they automatically lose Slovak citizenship upon voluntarily acquiring another one (see previous paragraph). Exempt from that law are only Slovak citizens who obtain a foreign citizenship by virtue of marriage with a foreign national. Some Slovak politicians have speculated in the media about softening the Citizenship Act, but no change has yet materialised as of January 2015. Citizens of both countries were allowed to cross the border using an ID card instead of a passport and were allowed to work anywhere without the need to obtain an official permit. Border checks were completely removed on December 21, 2007, when both countries joined the Schengen Agreement. Under the current European regulations, citizens of either country are entitled to the diplomatic protection of any other EU country and so both have been