The city council may from time to time transfer funds of the city not immediately needed for city purposes to the maintenance benefit area fund of the maintenance benefit area to be used for the payment of the expenses of such maintenance benefit area until such time as service fees collected for the maintenance benefit area are available therefor, the amounts so transferred shall be retransferred to the city treasury from the maintenance benefit area fund of the maintenance benefit area as receipts from collection of the service fee are available. (Prior code § 55.05.514)