Organizational Act of Coastal Patrol Directorate General in the Coast Guard Administration, Excutive Yuan Article 6

The Directorate General sets one director general, with the position of the normally appointed thirteenth level or as vice admiral, overall taking charge of affairs of Directorate General and commanding and supervising the affiliated units and personnel; and two deputy director generals, with the position of the normally appointed twelfth level or as rear admiral, assisting in taking charge of affairs of Directorate General.
中文原文 行政院海岸巡防署海岸巡防總局組織條例第6條
本總局置總局長一人,職務列簡任第十三職等或中將,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少將,襄理局務。

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