Support in the cases referred to in the preceding article shall be reduced or increased proportionately, according to the reduction or increase of the needs of the recipient and the resources of the person obliged to furnish the same. (147) ARTICLE 298. The obligation to give support shall be demandable from the time the person who has a right to receive the same needs it for maintenance, but it shall not be paid except from the date it is extrajudicially demanded.
Payment shall be made monthly in advance, and when the recipient dies, his heirs shall not be obliged to return what he has received in advance. (148a)