Regulations for Bid Bond, Guarantee Bond and Other Guarantees Article 26

Where a tenderer deposits a warranty 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 90 days longer than the warranty period prescribed in the contract.
中文原文 押標金保證金暨其他擔保作業辦法第26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保固保證金者,除招標文件另有規定外,其有效期應較契約規定之保固期長九十日。

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