(10) A serial number shall be printed on each ballot paper. <Amended on Jan. 25, 2010> Article 151 (Preparation of Ballot Papers and Boxes) (1) Each Gu/Si/Gun election commission shall prepare and make ballot papers and boxes to deliver them to Eup/Myeon/Dong election commissions by the day before the election day and the Eup/Myeon/Dong election commissions shall, upon receiving them, turn over them to the officials in charge of voting management after keeping the ballot papers in the sealed state together with ballot boxes. <Amended on Aug. 4, 2005> (2) In the voting for one election, two ballot boxes shall not be used at the same time at each voting district, and by voting district. <Amended on Mar. 12, 2004> (3) The ballot boxes to be used at an early voting polling station (hereinafter referred to as "early voting ballot boxes") and the ballot boxes to be used for keeping ballot papers received by mail safe (hereinafter referred to as "mail ballot boxes") shall be prepared separately, but the number of such ballot boxes shall be determined by each Gu/Si/Gun election commission in consideration of the estimated number of early voters, the number of persons reported for home voting, and the number of persons reported for shipboard voting. <Amended on Jan. 17, 2014> (4) A ballot paper shall bear the official seal of the competent Gu/Si/Gun election commission as prescribed by the National Election Commission Regulations. In such cases, the official seal may be substituted by a printed seal. (5) When the Gu/Si/Gun election commission delivers ballot papers that it prints to the Eup/Myeon/Dong election commission that shall in turn keep them after sealing them and then turn over the sealed ballot papers together with ballot boxes to the officials in charge of voting management, the Gu/Si/Gun or Eup/Myeon/Dong election commission shall allow party-recommended members of the relevant election commission to observe a series of these courses. In such cases, if any party-recommended member fails to observe them, he or she shall be deemed to renounce his or her observation. <Amended on Aug. 4, 2005> (6) Notwithstanding paragraphs (1) and (5), the Gu/Si/Gun election commission shall instruct the official in charge of early voting management to produce ballot papers to be distributed at early voting polling stations with a ballot paper printer at early voting polling stations. In such cases, the serial numbers printed on the ballot papers shall be marked in the form of bar code (referring to a code marked in the shape of a bar for recognition by computer), and such bar code may contain no information other than the name of election, the name of constituency, and the name of the competent election commission and serial numbers. <Newly Inserted on Jan. 17, 2014; Mar. 26, 2021> (7) When preparing ballot papers under paragraph (1) or (6), a space shall be inserted between each column of a political party or candidate, and the detailed preparation method shall be prescribed by the National Election Commission Regulations. <Newly Inserted on Aug. 13, 2015> (8) If necessary for an eligible voter who is unable to record his or her vote in person due to a visual impairment, the Gu/Si/Gun election commission may make and use a special ballot paper or voting aid as