Employment Service Act Article 10

(Ⅰ)During periods of legal strikes or ongoing industrial disputes resulting from the termination of labor contracts that affect the rights of the majority of the labor force, employment services institutions are prohibited from referring job applicants to work at the affected workplaces.(Ⅱ)The term "majority of the labor " as referred to in Paragraph 1 of this article is defined as: the involvement of ten or more workers in the industrial dispute within a business entity, or in cases where there are fewer than ten workers involved, one-third or more of the workers at the workplace subject to the dispute.
中文原文 就業服務法第10條
在依法罷工期間,或因終止勞動契約涉及勞方多數人權利之勞資爭議在調解期間,就業服務機構不得推介求職人至該罷工或有勞資爭議之場所工作。
前項所稱勞方多數人,係指事業單位勞工涉及勞資爭議達十人以上,或雖未達十人而占該勞資爭議場所員工人數三分之一以上者。

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