Preference Regulations for Leasing and Setting Up Superficies on Government Own Real Estate by the Private Sector to Build Public Housing Article 4

The lease term for public land and buildings shall be no more than 20 years. Upon expiration of the lease term, lessees who wish to use the leased real estate for the same purpose under the original public housing plan, are allowed to apply for lease renewals. Notwithstanding, the lease terms in the same project shall be no more than 50 years in total.The establishment of the right of superficies for public land shall survive no more than 70 years.
中文原文 民間興辦社會住宅使用公有不動產之出租及設定地上權優惠辦法第4條
公有土地及建築物出租之租賃期限不得逾二十年,租賃期限屆滿時,承租人仍依原社會住宅計畫用途使用租賃不動產,得予申請換約續租。
但同案租賃期限合計最長不得逾五十年。
公有土地設定地上權之存續期間,不得逾七十年。

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