The Commercial Port Law Article 6

The complete planning and development plan of the commercial port area are designated by the Commercial Port Administrative Authority, Maritime and Port Bureau, or the designated agencies, to consult and plan according to the opinions of local municipalities and county (city) of the commercial port. These are reported to the MOTC for relaying it to the Executive Yuan for approval and implementation.Except for commercial port facilities, it is allowed to, within the commercial port area, delimit various specialized zones, and establish export processing zones and free trade zones in accordance with the actual situation of the local area.
中文原文 商港法第6條
商港區域之整體規劃及發展計畫,由商港經營事業機構、航港局或指定機關徵詢商港所在地直轄市、縣(市)政府意見擬訂,並報請主管機關或層轉行政院核定。
商港區域內,除商港設施外,得按當地實際情形,劃分各種專業區,並得設置加工出口區、自由貿易港區。

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