International Airport Park Development Act Article 22

The rents or royalties Airport Corporation turns in according to Paragraph 2 of Article 11 and Paragraph 1 of Article 18 after it is officially established shall go to CAA Operating Fund.Airport Corporation, after paying taxes, offsetting losses and registering a legal reserve, shall appropriate 18% of the surplus for the special municipality or county (city) government. The remaining surplus shall go to CAA Operating Fund.
中文原文 國際機場園區發展條例第22條
機場公司成立後,其依第十一條第二項及第十八條第一項規定繳交之租金或權利金,應納入民航事業作業基金。
機場公司於完納稅捐彌補虧損,並提列盈餘公積後,盈餘之百分之十八應提撥予園區所在地之直轄市、縣(市)政府,其餘盈餘,應分配予民航事業作業基金。

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