Constitutional Court Procedure Act Article 30

Except otherwise provided in this Act, a judgment shall be rendered by a majority of the total number of the incumbent Justices of the Constitutional Court with a quorum of two-thirds of the total number of the incumbent Justices thereof taking part in the proceedings.The number of Justices taking part in the proceedings under the preceding paragraph shall not be fewer than ten. Where a declaration of unconstitutionality is rendered, the number of Justices in the majority shall not be fewer than nine. Where the proceedings cannot be commenced due to a lack of quorum as prescribed in the preceding paragraph, the Constitutional Court may issue an order dismissing the petition by a majority of the total number of the incumbent Justices.Where the Constitutional Court renders a preliminary injunction order pursuant to Article 43, a judgment upholding the impeachment pursuant to Article 75, or a judgment dissolving an unconstitutional political party pursuant to Article 80, the quorum and the decision threshold as prescribed in the preceding two paragraphs shall apply.Where the number of Justices recused pursuant to Article 12 of this Act exceeds seven, all of the Justices who are not recused shall participate in the proceedings, and a judgment or an order shall be rendered only by three-quarters of the non-recused Justices; the requirements set forth in Paragraph 2 shall not apply.Where the number of the non-recused Justices referred to in the preceding paragraph falls short of seven, no case shall be adjudicated.