Regulations for Administration of Base Stations of Mobile Communications Network Businesses Article 6

The valid period of the base station installation permit shall be one year. If the winning bidders or service operators cannot complete the installation in the time limit, an explanation shall be submitted to the NCC for the application for extension within one month during the last two months before the deadline. The extension cannot exceed six months and can be applied for once only.During the installation of the base station, the base station shall not emit radio waves unless the winning bidder or the service provider applies to the NCC for a short-term test or that the NCC undergoes the on-site technical inspection. The duration of the short-term test cannot exceed five days.
中文原文 行動通信網路業務基地臺設置使用管理辦法第6條
基地臺架設許可有效期間為一年,得標者或經營者未能於期限內完成架設者,應於期間屆滿前二個月起之一個月內敘明理由向主管機關申請展期。
展期最長不得逾六個月,並以一次為限。
基地臺架設期間,除依規定向主管機關申請短期測試或主管機關進行現場技術審驗外,不得發射電波。
短期測試期間最長不得逾五日。

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