(a) Upon each annual report's being made to the mayor and city council by the commissioners, the city council may lend or 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 hospital.
(b) The city council, at any time other than when the annual report is filed, may lend or appropriate such funds as it deems necessary from the general revenue fund or from such other funds as the city may have available for the purpose of maintaining and operating the hospital.