Without prejudice to the application of the specific rules for the formation of the types of companies mentioned in Article L. 6223-1, the acquisition by a natural person or legal entity of shareholdings in companies operating a medical biology laboratory is not authorised when the effect of this acquisition would be to enable a person to control, directly or indirectly, in the same area determined pursuant to b of 2° of Article L. 1434-9, a proportion of the medical biology supply in excess of 33% of the total number of medical biology examinations carried out.
Control, by a single person, of a proportion of the supply exceeding 33% of the total number of medical biology examinations carried out in the same area referred to in the first paragraph of this article is deemed to be effective where this person holds, directly or indirectly, the majority of the share capital of several companies operating a medical biology laboratory and the activity of these companies represents in total more than 33% of the medical biology examinations carried out in the said area.