27. Without prejudice to the application of paragraph 12 of this article, a witness, expert or other person who, at the request of the requesting State Party, consents to give evidence in a proceeding or to assist in an investigation, prosecution or judicial proceeding in the territory of the requesting State Party shall not be prosecuted, detained, punished or subjected to any other restriction of his or her personal liberty in that territory in respect of acts, omissions or convictions prior to his or her departure from the territory of the requested State Party. Such safe conduct shall cease when the witness, expert or other person having had, for a period of fifteen consecutive days or for any period agreed upon by the States Parties from the date on which he or she has been officially informed that his or her presence is no longer required by the judicial authorities, an opportunity of leaving, has nevertheless remained voluntarily in the territory of the requesting State Party or, having left it, has returned of his or her own free will.
二十七、在不影响本条第十二款的适用的情况下，对于依请求缔约国请求而同意到请求缔约国领域就某项诉讼作证或者为某项侦查、起诉或者审判程序提供协助的证人、鉴定人或者其他人员，不应当因其离开被请求缔约国领域之前的作为、不作为或者定罪而在请求缔约国领域内对其起诉、羁押、处罚，或者使其人身自由受到任何其他限制。如该证人、鉴定人或者其他人员已经得到司法机关不再需要其到场的正式通知，在自通知之日起连续十五天内或者在缔约国所商定的任何期限内，有机会离开但仍自愿留在请求缔约国领域内，或者在离境后又自愿返回，这种安全保障即不再有效。