Harbors and Navigation Code § 6270

The powers of a district established pursuant to this part shall be exercised by the board, by ordinance or resolution passed by a majority vote of the board. All ordinances shall be published in a newspaper of general circulation, printed or published in the county in which the district is situated, at least once before final passage.

Franchises and leases for a period of more than ten years shall not be valid, unless authorized by ordinance.