Condominium is constituted by entry in the land register.
Such entry may be requested:
on the basis of an agreement between the condominium owners to constitute their shares as condominium;
on the basis of a declaration by the owner of the property or the holder of a distinct and permanent building right to form shares in co-ownership and to constitute the same as condominium.
In order to be valid, the constitution of condominium must be executed in the form of a public deed or, where provided for in a disposition mortis causa or in a contract of division of estate, in the form prescribed by the law of succession.