California Code, Harbors and Navigation Code - HNC § 6812

The provisions of Chapters I and II of Division I of the District Organization Act shall govern and control the proceedings for the filing and hearing of the petition and the proceedings for final hearing of the petition and the formation of the district.  The “supervising authority” as used in the District Organization Act means the board of supervisors of each county in which is located any portion of land within the proposed district.

All proceedings necessary for the formation of the district, as provided in Chapters I and II of Division I of the District Organization Act, shall be had in each county in which is located any portion of land within the proposed district.  Land lying within any county within the proposed district shall not be included unless a majority of the electors in that portion of the district within the county vote in favor thereof.