北美事務協調委員會與美國在台協會間之特權、免稅暨豁免協定
http://law.moj.gov.tw/LawClass/LawA...?PCode=Y0040032

(e) Designated employees of each sending counterpart organization shall be immune from suit and legal processes

relating to acts performed by them within the scope of their authorized functions,

unless such immunity be specifically waived by the sending counterpart organization.
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不知道壓榨菲律賓籍勞工+扣留其護照，是否屬於本國授與外交官的職權範圍