GROUNDS: A. The complaints requesting the scrutiny of an election relate to the permissibility of the deployment of computer-controlled voting machines, which are also referred to as electronic voting machines or “election computers”, in the elections to the 16th German Bundestag. 2 I. 1. Roughly two million persons eligible to vote in Brandenburg, Hesse, North RhineWestphalia, Rhineland-Palatinate and Saxony-Anhalt cast their votes in the elections to the 16th German Bundestag via computer-controlled voting machines which are manufactured by the Dutch company Nedap and have been sold in Germany since 1999 as a central component of the “Integral Election System” (IWS) of H. GmbH. The type designations of these voting machines are composed of a name for the device generation (ESD1 or ESD2), as well as in each case of a version number for the hardware (HW) and for the software (SW). The types ESD1 (HW 1.02; SW 2.02), ESD1 (HW 1.02; SW 2.07), ESD1 (HW 1.03; SW 3.08), ESD1 (HW 1.04; SW 3.08) and ESD2 (HW 1.01; SW 3.08) have so far been used in elections to the German Bundestag. 3 These voting machines are controlled via a microprocessor and a software program. The votes cast are exclusively stored on an electronic storage medium and are counted electronically by the voting machine at the end of the election day. After the electronic ascertainment of the results, the voting machine shows the total votes cast for the respective electoral proposals; the results can be printed out via a printer that is integrated into the voting machine. The software program which controls the registration of the ballot and the ascertainment of the results is to be found on two electronic storage modules (so-called EPROMs; EPROM = Erasable Programmable ReadOnly-Memory) which are installed in the device under a screwed-on cover and are secured by two seals applied by the manufacturer. The votes cast at the voting machine – including the linkages (first vote and connected second vote) – are stored on a removable cassette-like storage medium – the so-called vote storage module, also referred to as “electronic ballot box” (see Schönau, Elektronische Demokratie, 2007, p. 53). The data of the voting slips, the attribution of the individual keys to the electoral proposals, as well as the date of the election and the polling station, are also stored on the vote storage module. 4 The voting machines have a keypad (“the voter tableau”) over which an insertion sheet is placed portraying a voting slip imitating the official voting slip. Above the key field one finds a display (LCD display) which guides the voter through the election procedure and enables him or her to examine her or her entries. The keypad and the LCD display are flanked by two vision-shielding panels on either side. On the reverse of the voting machine are the abovementioned printer and a slot for the vote storage 5 3/37

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