Government Procurement Act Article 15

Former procurement personnel and procurement supervision personnel shall be prohibited from contacting the entity that they previously worked for either for their own sake or on a supplier’s behalf for three years following their resignation for matters related to their former duties within five years prior to their resignation.The personnel of a procuring entity shall withdraw themselves from a procurement and all related matters thereof if they or their spouses, relatives by blood or by marriage within two degrees, or family members living together with them have interests involved therein.Upon finding that the personnel referred to in the preceding paragraph failed to withdraw themselves for any cause of withdrawal provided for in the preceding paragraph, the head of the entity shall order such personnel to withdraw and reappoint another personnel for replacement.
中文原文 政府採購法第15條
機關承辦、監辦採購人員離職後三年內不得為本人或代理廠商向原任職機關接洽處理離職前五年內與職務有關之事務。
機關人員對於與採購有關之事項,涉及本人、配偶、二親等以內親屬,或共同生活家屬之利益時,應行迴避。
機關首長發現前項人員有應行迴避之情事而未依規定迴避者,應令其迴避,並另行指定人員辦理。

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