All programs, dates and performers of the concerts organized by the Centro Nacional de Difusión Musical can change. In case of cancellation of any of the concerts scheduled, it will return to the part proporcional of the season-ticket acquired and to the general public the amount of the price of the seat. The return will be in effective 7 days after the cancellation of the concert in the place where the ticket was acquired. The suspension of a concert, not its delay, it will be the only cause allowed for the return of the tickets. It is recommended that the tickets kept with care, because it is not possible its repetition in the case of loss, damage or destruction. No complaints after the withdrawal of the tickets from the box office.