2021> (4) The ballot boxes delivered by mail as referred to in paragraph (1) and the early voting ballot boxes as referred to in paragraph (2) may be transferred to the counting center at or after 6 p.m. (8 p.m. in special elections) on the election day and may be opened for ballot counting, in the presence of counting observers, separately and ahead of opening and counting from ballot papers in ordinary ballot boxes. <Amended on Apr. 30, 1998; Mar. 12, 2004; Jan. 17, 2014> (5) Matters necessary for, among other things, installing visual data processing devices and keeping ballot boxes shall be prescribed by the National Election Commission Regulation. <Newly Inserted on Mar. 26, 2021> Article 177 (Opening of Ballot Boxes) (1) When ballot boxes are opened, the chairperson of the Gu/Si/Gun election commission shall open those ballot boxes after checking the closing and sealing of the ballot boxes in the presence of counting observers: Provided, That where any counting observer refuses to witness the ballot counting without good cause, the chairperson of the Gu/Si/Gun election commission shall enter the good cause in the ballot counting record after judging that the counting observer renounces his or her authority to witness the ballot counting. <Amended on Aug. 4, 2005> (2) The chairperson of the Gu/Si/Gun election commission shall count the number of votes after opening the ballot box, and check it with the number of issued ballot papers entered in the voting record. In such cases, if any of the members delays the ballot-counting affairs without good cause, he or she shall be deemed to renounce his or her authority and the fact thereof shall be entered in the ballot-counting record. Article 178 (Proceeding of Ballot Counting) (1) The ballot counting and the calculation of votes shall proceed under classifications by voting district. <Amended on Mar. 7, 2002> (2) In order to make it easier to count ballot papers, a Gu/Si/Gun election commission may sort ballot papers into valid votes and invalid votes or sort ballot papers for each candidate (referring to a political party in cases of an election of proportional representation members of the National Assembly or an election of proportional representation members of local councils) or may use machines or electronic computer systems necessary for computing. <Newly Inserted on Jan. 17, 2014> (3) The number of the votes obtained by each candidate (referring to the number of votes obtained by each political party, in an election of proportional representation members of the National Assembly or an election of proportional representation members of local councils; hereafter in this Article, the same shall apply) shall be announced by the chairperson of a Gu/Si/Gun election commission in the voting district unit on the basis of the ballot-counting briefing chart totalized and prepared by voting district, but all the members of the Gu/Si/Gun election commission who are present shall inspect the number of votes obtained before it is announced publicly and affix their signatures or seals to the ballot-counting briefing