Subject to the provisions of articles 173-1,174 and 175, the Investigating Chamber examines the regularity of the proceedings submitted to it.
If it discovers a ground for nullity, it declares the act in question null and void and, if appropriate, all or part of the subsequent proceedings.
After annulment, it may either evoke and proceed under the conditions provided for in articles 201,202 and 204, or refer the case file to the same investigating judge or to such other one, in order to continue the investigation.