Government Procurement Act Article 26

For a procurement of a value reaching the threshold for publication, the tender documentation shall be prescribed in terms of function or performance. In the event that there are applicable international standards or national standards, the tendering specifications shall be prescribed therewith.Technical specification laying down the characteristics of the products or services to be procured, such as quality, performance, safety, dimension, symbol, terminology, packaging, marking and labelling, or the processes and methods for their production and assessment procedures prescribed by the entity, shall not be prepared, adopted or applied with a view to, or with the effect of, creating unnecessary obstacles to competition.There shall be no requirement or reference to a particular trademark or trade name, patent, design or type, specific source of origin, producer or supplier, unless there is no other sufficiently precise or intelligible way of describing the procurement requirements and provided that words such as “or equivalent” are included in the tender documentation.
中文原文 政府採購法第26條
機關辦理公告金額以上之採購,應依功能或效益訂定招標文件。
其有國際標準或國家標準者,應從其規定。
機關所擬定、採用或適用之技術規格,其所標示之擬採購產品或服務之特性,諸如品質、性能、安全、尺寸、符號、術語、包裝、標誌及標示或生產程序、方法及評估之程序,在目的及效果上均不得限制競爭。
招標文件不得要求或提及特定之商標或商名、專利、設計或型式、特定來源地、生產者或供應者。
但無法以精確之方式說明招標要求,而已在招標文件內註明諸如「或同等品」字樣者,不在此限。

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