Mining Act Article 38

When applying for decreasing, combining or severing of the approved mineral concession, the mineral right holder shall submit application form, new and old mineral concession plan and reason statement to the competent authority. The area of the mineral concessions shall be still subject to the restriction of Article 9.The processing of the application in the preceding Paragraph shall be in accordance with Article 20, mutatis mutandis.
中文原文 礦業法第38條
礦業權者對於核准之礦區申請減區、合併、分割時,應檢具申請書、新舊礦區圖及理由書,向主管機關申請;其礦區之面積,仍應受第九條規定之限制。
前項申請案之處理程序,準用第二十條規定。

English translation for reference only; the Chinese text prevails. Not legal advice.