(1) If the plot of land is let on a lease or usufructuary lease, the mortgage extends to the claim for rent or for usufructuary rent.
(2) To the extent that the claim is due, it is released from liability upon the expiry of one year from the due date, unless it is attached to the benefit of the mortgage creditor prior to this date. If the rent or usufructuary rent is payable in advance, then the release does not extend to the rent or usufructuary rent for a time later than the calendar month current at the time of the attachment; if the attachment is effected after the fifteenth day of the month, the release also extends to the rent or the usufructuary rent for the following calendar month.