(1) The day-to-day maintenance is to be rendered by making periodical payments. The periodical payments are to be paid monthly in advance. The person obliged owes the full monthly amount even if the maintenance claim expires in the course of the month as a result of remarriage or death of the person entitled.
(2) Instead of the periodical payments, the person entitled may demand a lump sum as capital, if there is a compelling reason and the person obliged is not inequitably burdened by this.