Cal. Gov. Code § 37617

If other provision has not been made for maintenance of the hospital, the legislative body may levy a special tax, pursuant to Article 3.5 (commencing with Section 50075) of Chapter 1 of Part 1 of Division 1 of Title 5, and spend the proceeds to maintain the hospital and purchase necessary property for the hospital. The special tax is in addition to other taxes permitted in the city.