The Act of Organization for Maritime Patrol Directorate General, Coast Guard Administration, Executive Yuan Article 5

The Directorate General has one Minister, listed as Appointment Rank Grade 13 or equal to Commissioner General. The Minister should in general take responsibility for business in the Directorate General and direct, supervise the personnel in the unit. The Directorate General has two Vice Ministers, Appointment Rank Grade 12 or equal to Commissioner General. The Vice Ministers should support the Minister with business in the Directorate General.
中文原文 行政院海岸巡防署海洋巡防總局組織條例第5條
本總局置總局長一人,職務列簡任第十三職等或警監,綜理局務,並指揮、監督所屬單位及人員;副總局長二人,職務列簡任第十二職等或警監,襄理局務。

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