California Code, Health and Safety Code - HSC § 2061

(a) Whenever a public nuisance exists on any property within a district or on any property that is located outside the district from which vectors may enter the district, the board of trustees may notify the owner of the property of the existence of the public nuisance.

(b) The notice required by subdivision (a) shall do all of the following:

(c) The board of trustees shall cause the notice required by subdivision (a) to be served on the owner of the property in the same manner as a summons in a civil action. If, after a diligent search, the notice cannot be served on the owner of the property, the board of trustees shall cause the notice to be posted in a conspicuous place on the property for not less than 10 days before the hearing. Not less than 10 days before the hearing, the board of trustees shall also cause a copy of the notice to be mailed by certified mail to the owner of the property at the address shown on the most recent assessment roll of the county in which the property is located.

(d) At the hearing before the board of trustees at the time and place stated in the notice, the board of trustees shall accept written and oral testimony from the property owner and other persons. At the close of the hearing, the board of trustees shall find, based on substantial evidence in the record, whether a public nuisance exists on the property. If the board of trustees finds that a public nuisance exists, the board of trustees shall order the owner of the property to abate the public nuisance and to take other necessary actions to prevent the recurrence of the public nuisance. The board of trustees shall specify a reasonable time by which the owner of the property shall comply with these requirements.

(e) If the owner of the property does not abate the public nuisance and take the necessary actions to prevent the recurrence of the public nuisance within the time specified by the board of trustees, the district may abate the public nuisance and take the necessary actions to prevent the recurrence of the public nuisance. In addition, the board of trustees may impose civil penalties pursuant to Section 2063.