California Code, Health and Safety Code - HSC § 32003

Whenever the formation of a local hospital district is desired, a petition may be presented at a regular meeting of the supervising authority of the county in which the land, or a greater portion of the land, in the proposed district is situated, said petition to be signed by the registered voters residing within the boundaries of the proposed district, equal in number to at least 12 percent of the voters registered within the boundaries of the proposed district 30 days prior to the date the petition is filed. The number of written protests required to terminate the proceedings shall be a majority of the registered voters residing in the proposed district.

If a majority of all the votes cast in the proposed district are in favor of organization, the supervising authority by resolution entered on its minutes shall declare the district duly organized under this act, shall give the name of the district as theretofore designated and shall describe the boundaries of such district. The county whose supervising authority declares the district organized shall be designated the “organizing county.”