From the experience of rule of law adhered to in various countries, legislative body may exercise certain investigation power through its own committees in the light of needs to perform its function, and by requiring the party concerned be present, it can obtain relevant evidences or materials. However, owing to different systems, there are many controversies over the limits of investigation power of legislative body. There lacks a generally applicable standard as how to define the limits of investigation power; rather, the limits are set forth on the basis of diversified characteristics of various systems. Hong Kong now is following the system of executive-led government under the framework of ＂One Country, Two systems . Taking into consideration the particu- larity of the political structure of Hong Kong, the establishment of investigation power of Hong Kong Legislative Council should correspond to such system logically. By a comparative study on practices of legislative powers exercised by British Parliament and American Congress and in the light of relevant experiences of other countries, one can conclude that the exercise of investigation power by Hong Kong Legislative Council shall abide by principles of authorization, assistance, deference and availability of judicial review according to specific provisions of Hong Kong Basic Law and on the basis of the system of executive-led government, thus achieving a balance between administrative power, legislative power and judicial power.
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