Regulations for Bid Bond, Guarantee Bond and Other Guarantees Article 10

Where a supplier deposits a bid bond in the form of an irrevocable standby letter of credit issued or confirmed by a bank, bank’s written joint and several guarantee or insurer’s insurance policy of joint and several guarantee, unless otherwise prescribed by the tender documentation, the validity period of such instruments shall be 30 days longer than that of the price offer set out in the tender documentation. Where a supplier extends the validity period of the offered price, the validity period of the bid bond deposited by the supplier shall be extended accordingly.
中文原文 押標金保證金暨其他擔保作業辦法第10條
廠商以銀行開發或保兌之不可撤銷擔保信用狀、銀行之書面連帶保證或保險公司之保證保險單繳納押標金者,除招標文件另有規定外,其有效期應較招標文件規定之報價有效期長三十日。
廠商延長報價有效期者,其所繳納押標金之有效期應一併延長之。

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