The electors of the members of the territorial and regional chambers of commerce and industry are divided in each administrative district into three professional categories corresponding, respectively, to commercial, industrial or service activities.
Within these categories, the electors may possibly be divided into professional sub-categories defined according to the size of the companies.
Where the second paragraph is applied, the regional chamber of commerce and industry and the territorial chambers of commerce and industry attached to it shall define common sub-categories under the authority of the regional chamber of commerce and industry.