Co-ownership established following the publication of an initial declaration of co-ownership within the framework of setting-up a co-ownership by phases. The private portions are generally constituted of the lots intended to receive a building. Each of these lots is governed, once the building erected, by a concomitant declaration of co-ownership. The common portions are on their part constituted of the land and other equipment destined to the community of the co-owners of the project, such as the roadways, the outside parkings or the swimming pool.