Only the units or shares referred to in 6° or 7° of Article R. 131-1 of undertakings which:
a) provide in their articles of association or by-laws, without any restrictions other than those set out in article L. 214-67-1 of the Monetary and Financial Code, for the redemption of units or shares no later than two months after the unit-holder’s request;
b) On the other hand, use at least 20% of their real estate assets for buildings constructed, rented or offered for rent, under the conditions defined in articles R. 214-86 to R. 214-88 of the Monetary and Financial Code.