Enforcement Rules of the Patent Act Article 58
When requesting division of a patent application for design, a request form for each divisional patent application shall be submitted and accompanied by description and drawing(s).Where the priority prescribed under Paragraph 1, Article 28 applicable mutatis mutandis under Paragraph 1, Article 142 of the Act is claimed, a statement thereof shall be made at the time of filing the request form for each divisional patent application.The divisional patent application shall not differ from the original patent application in its type.