12. Where several certified associations represent some, but not all, of the workers of an establishment, the workers’ representatives on a committee are appointed in accordance with section 10.
Workers not represented by a certified association are thus deemed to form a participating group to which the provisions in subparagraph 2 of the first paragraph of section 10 apply, with the necessary modifications. However, that group may not appoint more workers’ representatives on the committee than all the certified associations.