The concept of "inside the country but outside of customs" is a defining feature of free ports in Taiwan. Ho says that international airports or harbors that are suited for establishing free ports can apply to have neighboring publicly or privately owned land designated as free port zones.
至於「境內關外」的特殊區域構想，何美玥表示，符合設置自由貿易港區的國際機場、國際港口，可以其附近之公、私有土地申請劃設為自由港區。