By virtue of article 56 of the Constitution and the law of 3 May 1880, the Chamber of representatives and the Senate may establish committees of inquiry.
A representative or senator is entitled to request that an inquiry be held.
This request is handled in the same manner as a bill. After the debate in committee, the request goes to the plenary meeting for discussion and voting. If the request is approved, the house of Parliament in which the request was made must appoint the committee of inquiry, upon which the investigation can proceed.
According to the law of 3 May 1880, the inquiry may be held by the Chamber or the Senate in their entirety or by a special committee. In practice, it is always a special committee which conducts the inquiry.
The committee of inquiry and its chairperson hold the same competencies as an examining magistrate. They may, amongst other things, call on and hear witnesses and experts. An inquiry may take anywhere from 1 month (e.g. Heizel drama), to 2 years (e.g. advertising on television).
Upon conclusion of the inquiry, the rapporteur designated by the committee gives an account of the inquiry to the plenary session. The plenary considers the report and makes a statement about the possible conclusions, recommendations or resolutions of the committee of inquiry. This may lead to a legislative initiative.
A great number of committees of inquiry were set up after 1950. In recent years, however, there has been some tension between the Parliament and the judiciary when both were investigating the same matters (e.g. the Transnuklear case).
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