TITLE II COOPERATION WITH THE INTERNATIONAL CRIMINAL COURT
CHAPITRE V OTHER FORMS OF COOPERATION
SECTION II FORM AND CONTENTS OF REQUESTS FOR ASSISTANCE
Article 23
In accordance with article 96, paragraph 2 of the Statute, the request shall contain or be supported by the following:
(1) a concise statement of the purpose of the request and the assistance sought, including the legal basis and the grounds for the request;
(2) as much detailed information as possible about the location or identification of any person or place that must be found or identified in order for the assistance sought to be provided;
(3) a concise statement of the essential facts underlying the request;
(4) the reasons for and details of any procedure or requirement to be followed;
(5) such information as may be required under Belgian law in order to execute the request;
(6) any other information relevant in order for the assistance sought to be provided.
Requests from the Court and the responses from Belgium shall be in one of the official languages of Belgium and in their original form.
SECTION III EXECUTION OF REQUESTS FOR ASSISTANCE
Article 24
The central authority shall review whether the request contains or is supported by the material referred to in article 96, paragraph 2 of the Statute and issue a preliminary decision not subject to appeal. If it deems the request to be in compliance with article 96, paragraph 2 of the Statute, it shall transmit the request to the competent judicial authority. If a request fails to meet the conditions provided in Section II of Chapter V of Title II of this law, the central authority may require it to be corrected or supplemented, without prejudice to any protective measures which might legally be taken in the interim.
Article 25
In accordance with article 99 of the Statute, Belgium shall execute requests for assistance according to the relevant procedure under its law and, unless prohibited by such law, in the manner specified in the request.
When requested to do so, the central authority shall authorize persons it shall designate to be present at and assist in the execution process.
National procedures for execution of requests for other forms of cooperation
EDIT.