152. Until the introduction of the land register within the meaning of article 2972 of the new Code, and subject to this division and the regulations thereunder, immovables which become immatriculated are entered in the index of immovables.
In addition, subject to the same restrictions, a file is opened in the register of real rights of State resource development in respect of every real right of State resource development created which the law declares to be property separate from the land on which it is exercisable.