The Director may decide, after consulting the Supervisory Board and with the approval of the establishment’s medical commission and the establishment’s social committee, to set up on an experimental basis, for a period of four years, an establishment committee replacing these two bodies to give an opinion on the draft decisions mentioned in article L. 6143-1. The establishment committee is made up of equal numbers of representatives appointed by the establishment medical committee, on the one hand, and representatives appointed by the establishment social committee in proportion to the number of seats held in this body by the trade unions and a college of managers, on the other. The Director chairs the Works Council.