Cal. Water Code § 71641

A district may prescribe and define by ordinance the restrictions, prohibitions, and exclusions referred to in Section 71640. Such an ordinance is effective upon adoption; but, within 10 days after its adoption, the ordinance shall be published pursuant to Section 6061 of the Government Code in full in a newspaper of general circulation which is printed, published, and circulated in the district. If there is no such newspaper the ordinance shall be posted within 10 days after its adoption in three public places within the district.