The ministerial meetings take place in camera in general every four years, circumstances and urgency however being able to justify the special convocation of the group apart from the regular meetings.

Each State is represented in those meetings either by the minister(s) interested by the subject or by the minister charged by his government with coordinating the action of ministries concerned with natural and technological risks hazards problems. For each State, a Permanent Correspondent is named who, in personal connection with the minister(s) taking part in the Ministerial Meetings, is in charge of preparing the meetings of the group; this Permanent Correspondent can be assisted by experts.