In the following cases for an immovable whole that falls under the system of compulsory co-ownership, as stated in Article 577-3 of the Civil Code, an exploratory soil investigation must be carried out on the initiative of and the costs borne by the association of co-owners before 31 December 2014:
- a risk installation was established on the piece of land where the compulsory co-ownership is established before the establishment of the co-ownership;
- a risk installation was established in the communal areas that were intended to benefit the compulsory co-ownership.
In the absence of an association of co-owners, the exploratory soil investigation is carried out on the initiative of and the costs borne by the co-owners.