The Regulation Governing the Handling of Investigation Procedures for Civil and Public Aircraft Occurrence Article 13

During the course of the investigation, the Ministry of the Interior, the Ministry of National Defense, and the Ministry of Transportation and Communications, the coast guard authorities, local governments and any private enterprises deemed appropriate and commissioned by the TTSB may, as requested by the investigation task force, take measures such as aerial surveillance or photography, and promptly report any information obtained to the TTSB.
中文原文 民用航空器及公務航空器重大飛航事故調查作業處理規則第13條
內政部、國防部、交通部、海岸巡防機關、地方政府或其他運安會認為適當且受委託之民間業者於調查期間,得按專案調查小組要求採取空中監測、攝影等措施,並將蒐集之資訊儘速通報運安會。

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