Title 2 Belgians and Their Rights
Article 12
Except in the case of a flagrant offence, no one can be arrested except on the strength of a reasoned judge's order, which must be served at the time of arrest or at the latest within twenty-four hours.
1. In respect of an investigation under this Statute, a person:
(d) Shall not be subjected to arbitrary arrest or detention, and shall not be deprived of his or her liberty except on such grounds and in accordance with such procedures as are established in this Statute.