All data that can be used to identify a natural person, for example by means of an e-mail address, a telephone number or a driving licence number. The register of the co-ownership may contain personal information about a co-owner, tenant or other occupant of the building. The syndicate of co-owners may not, without the consent of the person concerned or authorization by law, communicate such information to third persons or use it for purposes that are inconsistent with the purposes for which the file was established. It must, however, constitute, and keep at the disposal of the co-owners, a register containing the name and mailing address of each of the co-owners.