Government Procurement Act Article 38

A political party and a supplier who is affiliated to a political party shall not participate in tendering.The provisions of “Affiliated Enterprise” prescribed in the Company Act shall apply mutatis mutandis to the aforementioned supplier who is affiliated to a political party.
中文原文 政府採購法第38條
政黨及與其具關係企業關係之廠商,不得參與投標。
前項具關係企業關係之廠商,準用公司法有關關係企業之規定。

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