Standards for Time-limits for Tendering Article 7

Where an entity amends or supplements the content of the tender documentation prior to the closing of tendering period, the tendering period shall be extended as necessary.In the event that the amendment or supplement referred to in the preceding paragraph is not substantial and that all tenderers have been informed of such amendment or supplement through a published or written notice 5 days prior to the prescribed closing date, the entity may elect not to extend the tendering period.
中文原文 招標期限標準第7條
機關於等標期截止前變更或補充招標文件內容者,應視需要延長等標期。
前項變更或補充,其非屬重大改變,且於原定截止日前五日公告或書面通知各廠商者,得免延長等標期。

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