When applying the 20% ratio mentioned in article R. 214-86 to the undertakings for collective real estate investment mentioned in article R. 214-120, account is also taken, for the application of III of article R. 214-87 , of buildings constructed, rented or offered for rent, held directly by the undertakings mentioned in 5° of I of article L. 214-36, in proportion to the direct or indirect holdings of the undertaking for collective real estate investment in these undertakings.