Sand and Gravel Excavation Act Article 18

A sand and gravel excavator shall, within six months starting from the day following receipt of the Sand and Gravel Excavation Permit Certificate, prepare the required documents and apply to the Competent Authority of the Special Municipality or County (City) for the issuance of a Sand and Gravel Excavation Field Registration Certificate, and may commence operations only after the certificate has been issued. However, where there are justifiable reasons, an extension may be applied for before the expiration of that period, no more than twice.The Competent Authority of the Special Municipality or County (City) shall, after verifying that the facilities of the sand and gravel excavation field conform to the submitted sand and gravel excavation plan, issue the Sand and Gravel Excavation Field Registration Certificate and report the issuance to the Central Competent Authority for record.
中文原文 土石採取法第18條
土石採取人應於領得土石採取許可證之次日起六個月內,備具書件,向直轄市、縣(市)主管機關申請核發土石採取場登記證後開工。
但有正當理由者,得於期限屆滿前申請延期,並以二次為限。
直轄市、縣(市)主管機關查核其土石採取場設施與所提土石採取計畫相符後,發給土石採取場登記證,並報中央主管機關備查。

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