The Plenary Assembly established several Working Groups, composed of representatives of the IRG-Rail members and each chaired by one or more IRG-Rail member(s). Any other Regulatory Body having expressed an interest in a topic of a Working Group can participate in the Working Group.
The Working Groups report to and submit draft documents to the Plenary Assembly for approval.
In principle, Working Groups are free to organise themselves and meet regularly. The Working Group Chair is responsible for coordinating the work.