(1) Upon each quarterly report being made to the mayor and city council by the commissioners of a municipal auditorium commission, the city council may appropriate funds from the general revenue fund of the city, or from such other funds as the city may have available, to make up any deficits or to provide such funds as may be necessary to carry on the operations of the auditorium.
(2) The council may, at any time other than when the quarterly report is filed, appropriate such funds as it deems necessary from the general revenue fund or such other funds that the city may have available for the purpose of maintaining and operating the auditorium.